You just finished writing a post, and WordPress asks you to file it under a category and add a few tags. In the dashboard, the two boxes look almost identical, so it’s easy to treat them as the same thing, but they’re not.
Categories are the broad topics your whole site is built around, and tags mark the specific details an individual post touches on. And here’s the short answer for SEO: categories are your foundation, and tags mainly help readers find related content.
In this guide, you’ll learn when to use each one, how many of each you actually need, and how your choices affect both Google and AI search.
Here’s everything we’ll cover in this guide:
What Is the Difference Between Categories and Tags?
Think of categories as the chapters of a book and tags as the index at the back.
Categories represent the main topics your site covers, organized hierarchically. Tags label specific subjects mentioned across your content, and they’re non-hierarchical.
Here’s an example from a food blog:
- Primary Categories: Breakfast, Lunch, Dinner, Snacks
- Subcategories (under each main category): Vegetarian, Gluten-Free, Under 10 Minutes
- Tags: Beef, Fish, Pasta, Rice, Garlic, Quick Meals, Family-Friendly, Budget Recipes
Here is an example of categories and subcategories in the sidebar on our test website:
When viewing a post titled “Vegetarian Breakfast Bowl,” you can see which category it belongs to.
Here, it’s under the Breakfast category and the Gluten-Free and Vegetarian subcategories.
This blog post also carries the tags Family-Friendly and Budget Recipes. Those tags let readers find all family-friendly recipes across any meal category or all budget-friendly recipes regardless of meal type.
Every post needs at least one category, but tags are always optional.
Reach for a tag only when it helps readers cross-reference content across categories, and skip any tag that just repeats a category name, since a Breakfast tag next to a Breakfast category adds nothing. A good tag captures a cross-cutting detail your categories don’t, like Family-Friendly or Budget Recipes.
Since every post needs a category, WordPress files anything you publish without one under a default category called “Uncategorized.” That label tells readers and search engines nothing about your content, so don’t leave posts there.
You can rename the default under Posts » Categories, set a different default under Settings » Writing, and reassign any posts already filed under “Uncategorized.”
To learn more, see our guide on how to add categories and tags to WordPress pages.
What Is the Optimal Number of WordPress Categories?
There’s no fixed rule. The right number depends on how many distinct topics your site covers, not how often you publish.
General rule of thumb: 5-10 main categories for most sites. Make sure each category has at least 5 posts, or it may not be worth creating yet. Topical authority builds from there as the category grows.
Add a new category only when you’re genuinely covering a topic that doesn’t fit any of your existing ones.
If you have 20, 30, or 50 categories, then you likely have too many. When your categories are spread this thin, none of them holds enough posts to stand out to search engines, and visitors have a harder time finding their way around.
Instead, consolidate overlapping categories and use tags for more specific organization.
Categories vs Tags: What’s Better for SEO?
Categories are more important for SEO. But tags serve a valuable supporting role when used correctly.
Category pages build topical authority, and this compounds as the category fills out. The more high-quality posts Google sees in your “Gluten-Free” category, the more it recognizes you as an authority on that topic.
Plus, category pages often appear in URLs (if your permalink structure includes them), get linked from your navigation menu, and accumulate internal links from breadcrumbs and related posts.
Tags create the opposite problem. Each one creates its own archive page, and those pages are often thin, sometimes just a post or two. Too many of them bury your best content under near-empty pages, which makes it harder for search engines to tell what actually matters.
That’s why most sites benefit from noindexing tag pages that don’t add unique value (excluding them from search results), which keeps search engines focused on your posts and category pages.
In most SEO plugins, this is a single toggle in your taxonomy or search appearance settings, and our guide on how to optimize your WordPress category and tag pages shows you where to find it.
Our recommendation: Use categories as your SEO foundation and tags for user experience and content discovery.
Do Categories and Tags Matter for AI Search?
Yes, and increasingly so. AI answer engines like ChatGPT, Perplexity, and Google’s AI Overviews favor sites that show real topical depth. A well-organized category is exactly that: a cluster of related posts on a single subject.
A site with one good article on a topic looks like a lucky hit. A site with a category of 10 to 15 interlinked posts on that topic looks like a genuine authority worth citing.
One 2026 benchmark from Slate, an AI SEO analytics platform, found that domains with 10 or more interlinked pages on a topic cluster earn AI citations at roughly 2 to 3 times the rate of single-page competitors.
Tags need the same treatment they get for regular SEO: keep thin tag pages noindexed so they don’t dilute your best content.
For more tips, see our guide on how to get your WordPress content cited by AI tools.
FAQ: Common Questions About Categories and Tags
When do you add subcategories?
Add subcategories when:
- A main category has 20+ posts and needs better organization.
- Your audience needs finer navigation within a broad topic.
- You want to create more specific topical clusters for SEO.
Do you have to use subcategories?
No. Subcategories are completely optional. Many successful WordPress sites use only top-level categories and rely on tags for additional organization.
Only add subcategories if they genuinely improve navigation and you have enough content to populate them. This can roughly be 10+ posts per subcategory, a higher bar than the 5-post floor for a top-level category, because a subcategory splits an existing category, and you don’t want to fragment it before there’s enough content to justify the split.
Is it okay to assign one post to multiple categories?
Technically yes, but we don’t recommend it. Assigning one post to multiple categories creates:
- Duplicate content issues – the same post appears on multiple category archives (Google won’t penalize this, but it blurs which page should rank).
- Confused site structure – which category is the “real” home for this post?
- Repetitive user experience – readers see the same post twice.
Instead: Choose ONE primary category that best represents the post’s main topic. Use tags for cross-referencing any other topics it touches on.
Do tags work like meta keywords?
No. Meta keywords are obsolete hidden HTML tags from the 1990s that search engines have ignored since 2009. WordPress tags are a visible, front-end feature designed to help your actual human visitors discover related content.
Is there a limit to how many tags a post can have?
Technically no, but the right answer is 5-10 tags per post.
Each tag you add creates a tag archive page. If every post has 30-40 tags, you end up with hundreds of thin tag pages (2-3 posts each) that dilute your SEO value.
Before adding a tag, ask whether you’ll reuse it on several other posts. The right number depends on your site, since a busy news site can support far more tags than a small blog, but the rule of thumb holds: if a tag will only ever apply to one post, it’s not worth creating. This keeps your tag archive pages substantial and your tag structure meaningful.
What if you’ve already over-tagged or organized posts the wrong way?
You don’t have to re-tag every post by hand. WordPress has a built-in tool that moves your posts between categories and tags in bulk.
Go to Tools » Import, find Categories and Tags Converter at the bottom of the list, and click Run Importer. WordPress will install the free importer the first time you run it.
From there, you can convert categories to tags or tags to categories, and you get to pick exactly which ones to move. This is what you want when broad topics ended up as tags but really belong as categories.
For stray one-off tags you just want to remove, go to Posts » Tags instead, select the ones you don’t need, and apply the bulk Delete action.
Next Steps to Improve Your WordPress SEO
How you organize your categories and tags is just one part of WordPress SEO. For the full picture, see our ultimate WordPress SEO guide and our WordPress SEO checklist for beginners.
If you liked this article, then please subscribe to our YouTube Channel for WordPress video tutorials. You can also find us on Twitter and Facebook.
Aman Singh
if I set indexing no no-index for categories and tags then how these helps in ranking.
WPBeginner Support
It is believed that no-indexing the categories and tag pages means it is less likely for Google to see duplicate content due to those pages and the pages specifically for listing the posts in a category or tag are far less useful than the posts themselves.
Admin
Mrteesurez
I appreciate how this post clearly breaks down the SEO benefits of using categories and tags. Understanding the difference has significantly impacted my content strategy. Early on, I was confused about how to organize my blog posts effectively. Implementing the best practices mentioned here, I started using categories for broad topics and tags for specific details, which improved my site’s navigation and search engine visibility. It’s essential to structure content this way for better user experience and SEO.
Moinuddin Waheed
Thank you for sharing your experience.
This is almost the case with ever one of us.
We interchangeably use tags and categories but in reality both are two different things.
Moreover, categories make the organisation of the content not just for seo but for our own understanding.
And tags helps greatly in seo and search visibility.
Dennis Muthomi
I find tags super helpful for connecting related content and helping users discover more of my posts
but I have a question about tags:- is there a way to track which tags are getting clicked the most?
WPBeginner Support
If you are using an analytics plugin on your site, that would give you that information
Admin
Dade
Hi, in the article you mentioned all of your new “websites use the modern ‘Post name’ URL structure.”
But it isn’t stated why.
Do you have troubles with analyzing performance when both pages and post content is off the root domain?
WPBeginner Support
The main reason is to make it easier for users to remember your URLs. It would depend on the organization of the site for how difficult analytics would become.
Admin
Mrteesurez
Yes, users find it easier to read “post-name” URL than others, it is even SEO friendly that makes it easier for search engines to read and identify the content inside.
mohadese esmaeeli
with this simplicity, I’ve grasped the concept of tags and categories. In reality, categories serve for content differentiation, and tags are considered internal classifications within the site.
WPBeginner Support
That is one way to separate them certainly
Admin
mohadese esmaeeli
With tags, you can create more detailed internal categorizations. For example, consider that the WordPress installation tutorial is placed in the WordPress tutorials category, and the Joomla installation tutorial is placed in the Joomla tutorials category. What is the commonality between these two? Both are content management systems. So, you can assign a tag called “CMS” or “Content Management System” to both. Someone looking for various content management systems can click on this tag to access tutorials on installing content management systems.
Jiří Vaněk
I would like to ask. I have categories and sometimes I have a label that has the same category name. For example WordPress category and WorPress tag. For each label and category with the same name, I also have the same labels. But Yoast SEO already pointed out to me that it is not good from SEO point of view to use the same keywords. So is it better to target slightly different keywords and use different labels for both? And the second question, is it good to index categories and tags or not?
WPBeginner Support
Indexing categories and tags is good for SEO, it is normally best to have different words for your tags and categories.
Admin
Jiří Vaněk
Thanks for reply. I wil try to make some changes in description of both. I thought that it could be the same, but it is true that this way both the tag and the category can find use under slightly different keywords.
THANKGOD JONATHAN
Categories and tags are what is helping me in my blog search filter. Without them it couldn’t have been that easier. They are all important
Juan
I’ve considered naming my post categories as post formats (articles, podcasts, videos, etc.). Is that a clever idea, or should I stick to the website’s topics/subtopics?
WPBeginner Support
It would heavily depend on your specific site and its content.
Admin
Sajid
where is your tags?
WPBeginner Support
At the moment we do not have tags visible to be searched.
Admin
tayyab
thanks for information
WPBeginner Support
You’re welcome
Admin
Karin
Thanks for the great article, very helpful!
WPBeginner Support
Glad our guide was helpful!
Admin
Vinny Hguen
Excellent article! I love how you explained these two abstract terms in simple languages along with relatable examples.
Keep up the good work!
WPBeginner Support
Glad you found our guide helpful
Admin
Sue Davies
I have a parent category “Jewellery”, which has a sub category “Earrings”. Many of my products are earrings, so they are listed in the Earrings Category. I have tagged them all with “earrings”. Is this OK, or should I avoid doing that? I have optimised the Earrings Category in SEO, but not sure what to do with the orphaned tags for “earrings”, “blue”, “crystal”, “sapphire”, etc.
Andre
What I’m curious about is if a URL has the parent category/subcategory/post structure if the parent has no content in it, but it simply used to create a primary category is BAD for SEO? I’m setting up a bunch of tutorials but want all sub cats to be under “Documents” as the parent, then all sub cats will have the posts.
Kagai wa Kamau
I have 2 queries on SEO impact
1. if i have one post under 2 categories , is that duplicate content?
2. can one use many tags in one post and use the same tags on another post?
Kind Regards
WPBeginner Support
If you have a post under two categories, it would normally be better to look at if you can make the post fit under a single category or reorganize your categories if it is a consistent issue.
The same tags can be used on different posts.
Admin
Alaba
So if I understand it correctly I can delete any category and redirect those categories to other categories, right?
WPBeginner Support
Yes
Admin
Alaba
Hi, what should I do, if I have too many categories that I don’t use? What should I do? Should I delete and redirect them to other categories?
WPBeginner Support
If you are not using categories and have no plans to it would normally be best to create those redirects and remove your unused categories. If you have not added any posts to those categories then there likely isn’t any post that needs to be redirected.
Admin
Aditya Mondal
This post was really helpful to me.Thanks
WPBeginner Support
Glad our guide was helpful
Admin
yomer gaytano
HI,
In a single post, only one category, is that right?
Because I do use more than one category in each of my post. What would be the problem with this?
WPBeginner Support
As we state in the article, that can cause duplicate content issues.
Admin
Shreesha
Is putting content in multiple categories really bad for the site?
WPBeginner Support
It is not bad in general but if you are only adding a post to categories trying to improve SEO, then it would be bad for your SEO.
Admin
Alisha
But do I HAVE to use categories or can I just use pages? For example, I want to create a dessert website. If I have the button Recipes in my menu and then under that I have Basic recipes for example, can this just be a page and from there I link to different posts? or does it have to be a category from which I link to the different recipe posts?
WPBeginner Support
You would not need the category in the short term but the more recipes you add, the harder it would be to keep all of them in your menu. By adding the posts to a category, you can add the category to your menu for WordPress to create the list of posts for you.
Admin
Emmeline
Hi, I noticed that each category and tag automatically gets it’s own page. Most independent SEO tools/audits tell me these pages are not optimized well because of low word count, etc. – but is this really an issue? From a user perspective, I don’t want random text cluttering up my site just to meet a word count. How do search engines take this into account? Is it fine not to include any tag/category description? Would it be bad to ask search engines not to index my tag pages? I don’t really understand these pages, as it seems like user experience and SEO are at odds on this issue…
WPBeginner Support
Those tools normally see all pages as content pages, you shouldn’t need to worry about the category and tag pages even if the tools don’t read them properly.
Admin
Sam Onuegbu
Hi,
Your articles and videos have always been of immense help.
One question…
You recommended 5 – 10 max categories in your expert opinion.
Is there also a recommended limit for subcategories or as much as is necessary?
WPBeginner Support
Glad our articles have been helpful, we would recommend limiting subcategories as well unless you are sending out a massive amount of content.
Admin
Julie Scott
I am using Wordpress and Yoast. Is it necessary to write a 300 word description for each tag?
WPBeginner Support
It is not necessary and can sometimes be helpful for SEO should a user find the tag in a search result for your site.
Admin
Shivam Gumber
I was making my wordpress notes and your posts are very helpful thank u very much.
WPBeginner Support
You’re welcome, glad you found our article helpful
Admin
Kuldeep Singh
Hello,
Great Post, I have one question.
Can I Post Same article on 2 Category.
Thank you.
WPBeginner Support
If you wanted to you certainly could but if that becomes common you may want to think about restructuring your categories.
Admin
Rana Abrar
I have a question. In my word press “add new post” page there is no category table. What to do?
WPBeginner Support
You would want to check in the screen options in the top-right of the page to ensure that section was not hidden. For the block editor, you would want to ensure you are looking at the document settings
Admin
ME VK
Tag One Word or Two?
WPBeginner Support
That choice would be up to you
Admin
Hamza Bashir
I have a question. I have seen some websites that add extra tags. These tags have nothing to do with sorting of posts rather they do keyword stuffing in multiple tags. What is your take on this. Like I have seen such posts with 30 tags and all of them were keywords not tags. Does it help in SEO?
WPBeginner Support
We would only recommend using tags for organization at this time.
Admin
Chandramohan
Hi, above you said that having a single post in multiple categories can lead to duplicate content, but what about tags, assigning multiple tags to a single post, doesn’t that too lead to duplicate contents? Because, tags do have a URL right? Will it effect the SEO?
WPBeginner Support
While tags could run into that issue, it is unlikely to cause an SEO issue with how tags are handled.
Admin
Rob Kenyon
No such thing as ‘Document Settings’ on the right hand of my page.
No sign of Tags or Categories anywhere.
WPBeginner Support
If you are using a page builder or on WordPress.com your interface may look different, if you are on WordPress.com we cover the difference between that and WordPress.org in our article below:
https://www.wpbeginner.com/beginners-guide/self-hosted-wordpress-org-vs-free-wordpress-com-infograph/
Admin
Rupam Sarmah
I have almost 10 category and almost 50 sub category in my lyrics website ..but I am not using any tag..is there any issue in seo
WPBeginner Support
There should not be.
Admin
Richard Martin
Like!! Great article post.Really thank you!
WPBeginner Support
You’re welcome, glad our guide was helpful
Admin
Todd
Is there anything wrong with having sub-sub-categories? I do think this helps my users find posts on my site, and it fits the hierarchy, but maybe they should be tags instead
WPBeginner Support
If it works for how you are organizing content then it is fine unless you think of a better way to organize your content
Admin
Milad
can we use this instructions for wocommerce and products as well ?
WPBeginner Support
You can if you would like
Admin
hdys
I have a page on my site (not category or tag) and the topic is “France tour”, and I also have a category name “France tour”, is it correct? how can I show google that my landing page is Target and the category is different?
WPBeginner Support
That type of markup would naturally be handled by your SEO plugin if you are using one on your site.
Admin
Derek
I maintain a web site created using WP that has no blogs/posts i.e. its web pages only. Iam concerned that search engines find the site/right page but I do not know if catagories and tags are relevant to the site. Is their any guidance on this?
WPBeginner Support
It would depend on how much content you have but pages don’t have categories by default.
Admin
Itivere Desmond
I love this article, it answed ALL of my questions.
WPBeginner Support
Glad our guide was helpful
Admin
Anjoo
Would the same apply for pages?
WPBeginner Support
Pages don’t use categories by default.
Admin
Adeel Sami
Always feel great to land on the wisdom shared by you guys!
For me, I always keep ‘NoIndex’ the tags and ‘Index’ the categories; is it wise to do so?
I feel like there would be too much of the URLs getting indexed in the search engines coming up with the duplicate/same content.
Lastly, always the great wokr!
WPBeginner Support
That would be personal preference, you should not need to noindex the tags
Admin
Robin
I think you can describe more about index and no indexing of tags and categories. There is lot of confusion about this. Also category and tag sitemaps should be submitted to google search console or not?
WPBeginner Support
Thank you for your request, for the Search Console, you would want to take a look at our article below:
https://www.wpbeginner.com/beginners-guide/how-to-add-your-wordpress-site-to-google-webmaster-tools/
Admin
DannyNab
Thank you very much for this insightful article. I’m really blessed reading this piece.
WPBeginner Support
Glad you found our guide helpful
Admin
Rehoboth
Pls i created a music and news blog I have about six categories no tag and for my music I use two categories which is trending categories and music categories will I have any issues with that
WPBeginner Support
You should not have an issue with that.
Admin
Patrick
Great article, very helpful. My only question that I have been unable to find an answer to is this: Should I noIndex Category pages?
While I think a user that landed my category page would find value, I have read that it can hurt SEO as your category page is essentially competing with your posts under that same category.
WPBeginner Support
You would want to reread the section ‘Is it okay to assign one post to multiple categories?’ for our opinion on category pages. Normally, there is no need to noindex category pages.
Admin
Devin Egger
GREAT content and SUPER HELPFUL article, but TONS of typos. : D
WPBeginner Support
Thanks for your feedback on our article
Admin
Marlene Permin
thank you for the article, i understand the difference a little better now, but i have a question.
we have a magazine, and use wordpress, to have our site.
we have over 800 articles in a lot off different topics and a lot off them have different tags on them,
with means we now have over 600 different tags on our site.
(i have taken over running the site from a former coworker) and tags where always entered when she added our new articles.
should i remove the tags from our site or should i leave them?
i dont want to hurt our Seo.
WPBeginner Support
That would be a personal choice question but you may want to reduce the number of tags you have over time so more posts are under a tag.
Admin
Tala
Thank you for helping me to be a better novice site builder for my small corner of the web! Let me not forget to mention that thought this is my first “comment” here, I have watched your YouTube for years and am grateful for your wealth of knowledge. Happy 2020!
WPBeginner Support
You’re welcome, glad our recommendations were able to help you
Admin
Martin
Thanks for this (and the site in general).
As someone who has worked on many websites, I’m comfortable with the categories/taxonomy, but being new to WordPress the tags are trickier to get my head around.
I actually think the key point is in your last paragraph – tags can be across multiple categories, while sub-categories should only sit under the one category.
WPBeginner Support
You’re welcome, glad you like our site and our content
Admin
Jennifer
THANK YOU! THANK YOU! THANK YOU! I finally understand the difference and how to use them now!
WPBeginner Support
You’re welcome, glad our guide could help
Admin