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.
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
Zahid H
I am starting a WP site on phones. I don’t have any posts and everything is under custom post types or static texts in a page. It’s meant to be a website rather than a blog, are categories and tags still needed? Thabks
WPBeginner Support
While not required, they can be helpful for grouping similar products
Admin
Oty Emmanuel
Thanks very much for this writeup. I have lots of irrelevant tags littered all over my site. Will it hurt my site if i delete them?
WPBeginner Support
You would likely want to create redirects for the deleted tags to prevent 404 pages, other than that you can feel free to remove them.
Admin
James
Would you recommend renaming the tag base from “tag” in the permalinks section?
I’ve seen another site that has changed theirs to “all-about” and I wondered whether there were any SEO reasons for doing this.
WPBeginner Support
You would need to redirect any post using the old link but that shouldn’t have a major SEO impact either way.
Admin
TJennings
Great article, and I sent a link to my client because it’s so good, but could use a lot of proofreading. A lot.
WPBeginner Support
Thank you for your feedback
Admin
John J
This is a great article and helped me understand the categories and tags but how do they relate with image galleries if you have hundreds of images?
WPBeginner Support
Unless the images are in multiple posts or you’re using a plugin that adds them to images, they aren’t added by default to images
Admin
Jim Gersetich
Excellent article! It’s very helpful. I’ll be implementing on my blog site immediately.
Thank you!
WPBeginner Support
Glad you like our recommendations
Admin
Surojit Mukherjee
Great explanation sir. ..I had little bit of confusion about categories & tags, but after reading your article it is clear to me. ..
Thanks a lot
WPBeginner Support
Glad our article could clear up your confusion
Admin
paula
I have a WP video site where members can post YouTube links to their videos. I have several categories for the video posts.
I want to have a “featured” type of display on the home page where I, as the admin, select videos to feature, or post my own videos there, but I want this to be off-limits to users. Otherwise, I think everybody might be labeling their video as “featured.”
Can any of this be controlled by categories or tags? Is there a way to have a category or tag that only the admin can apply?
Any hints are appreciated.
WPBeginner Support
Rather than the category, you could use the built-in sticky post option: https://www.wpbeginner.com/beginners-guide/how-to-make-sticky-posts-in-wordpress/
Admin
REGS
Very helpful this blog. I learned many new strategies, especially good use of categories in WordPress. You did great work by sharing it.
WPBeginner Support
Thank you
Admin
Pamela Torres
I have a WP blog. All of my postings are falling under my Home Page. Nothing is showing up under any of the categories I have across the top. I need to know how to move those posting from Home, to the category that they need to be under.
Please help me. I worked on it until 3 a.m. and it was frustrating. Also I need to know how to set up a “leave a reply” after each of my posts.
WPBeginner Support
For the menu items, rather than pages in your menu you would want to ensure you placed the categories themselves in your menu and your posts are set as part of those categories.
To allow comments you would want to ensure you’re allowing new comments under Settings>Discussion for new posts and your old posts should have a discussion settings area to enable comments
Admin
rachana bhapa
found this information quite useful. I’m starting out new with my travel blog and I found so many answers and information related to my queries on your site. keep up with the great work. !!!
WPBeginner Support
Glad our site’s been helpful
Admin
R. Murillo
Thank you for sharing your expertise with us. It has been very helpful.
As they say, knowledge is power, how true. Simple things seem to be very complicated when they are not.
I am still struggling to get my word press blog to work.
r. murillo
WPBeginner Support
Glad our article could help, feel free to reach out to us should you continue to struggle with your site
Admin
Avantela
Wow, thanks for the insight. It’s easy to understand. It helps me solving my problem with my new blog.
WPBeginner Support
Glad our article could help you
Admin
Abdul
This is Great Piece of work
WPBeginner Support
Glad our article could be helpful
Admin
Rashmi
Thanks for posting this. Very useful information for wordpress users.
WPBeginner Support
Glad you found our tutorial helpful
Admin
Susan Soltrelly
Really helpful! I was in the same boat, wondering whether I still needed to tag posts. It seems a bit archaic.
However, I do mark some posts under more than one category. I feel like if I had to narrow my categories further I’d have 50 of them! I do know that at least I find them helpful when I’m looking up old posts at our blog.
Ashwani
Do you recommend ideal no. Would be in between 5-10 for tags, plz answer
kym
Hi you mentioned: “Yes, you will have to go back and edit your older posts. If your URL structure is /category/postname/, then you have make sure you are using the Redirection plugin. It automatically redirects your modified posts to their new URL, so you can keep all the search engine rankings” But elsewhere in another blog, https://www.wpbeginner.com/wp-tutorials/seo-friendly-url-structure-for-wordpress/ it said that we will lose search engine ranking if we change permalink structure.
Why is there a contradiction?
WPBeginner Support
Hi Kym,
Yes, you will lose search rankings if the old URL starts showing 404 error or duplicate content. That’s why you need to properly redirect URLs so that search engines can fine the content on new location and start showing it in the search results.
Admin
Emma
On the subject of assigning multiple categories to a post…I see what you mean about this generally being a sign of a much-needed category reorganization, but I would like to point out an exception. My blog is about science—it’s open to every field, though I’ve just started out with 12—and each science field is a category. However, science fields are often multidisciplinary. For example, I might write an Astronomy post on star stuff, but that also fits into Spectroscopy. There are also Astronomy and Chemistry crossovers. I think that ultimately, it’s up to the blogger how they want to organize their categories…but these are all good points
I have a question…will it affect my search rankings at all if I use the “science” tag for all posts? If so, positively or negatively?
WPBeginner Support
Hi Emma,
We agree. As for the ‘science’ tag. If all your posts are tagged science then basically the science tag pages will be duplicate of your main archives with essentially the same content. This could effect your SEO negatively.
Admin
J. Adams
I would like to ask that if you assign a post to a category and a tag at the same time, won’t that result in duplicates and affect your search engine ranking?
Marta
As far as I know, it is important that I give every category and tag not only meta tags but also a description. This can be also a longer text. I planned to do so and optimize those urls for seo too (it was suggested by a seo tool) but these descriptions are usually not visible for my readers. But I thought they would be worth reading and could be a nice introduction into that cercain category. Should I make the effort in the first place and if I do so, how can I make these descriptions visible, readable for my users?
WPBeginner Support
Hey Marta,
Please see our guide on how to display category descriptions in WordPress.
Admin
Annavaram
Great explanation! I find this post highly useful, clearing up the confusion I have had about the categories and tags for a long time. I recommend that the net wonderers spend some time and read it with a peace of mind if they were ever to know what “categories” and “tags” really are.
Raheem
Hi,
For a site that has mobile phone, automobiles, banking, technology as parent categories; review, tutorials, interviews and news are being handled by tags. But the ‘news’ is always in abundant, i mean they are in hundreds.
Should i make it (news) a separate parent category and select two parent categories for any post that is news as well as belong to any of the other parent categories or i should keep handling it through tag? and should on the basis of news tag, it can be submitted to google news?
Sarah
If we move categories into subcategories, does that break links/cause a Google penalty?
Thanks
Kay
I also have this question. Please advise. Thanks!
Editorial Staff
If you don’t setup proper SEO redirects, then yes it can have a negative SEO impact for those pages.
Admin
Rakhee
I am in the process of creating a website and am confused whether to create categories in my menu or pages. I understand that pages are for static information such as About me, contact me etc. If I wanted to create a menu bar containing a nutrition, treatments folder etc would you suggest using pages or categories? Thanks!!
WPBeginner Support
Hi Rakhee,
If you are planning on continuing to add new content into those topics, then categories are the way to go.
Admin
Debra
Thanks for the free education. I really appreciate it. I’ll put it to use in my blogs.
Luz K Lee
This is an excellent tutorial on categories, sub-categories, and tags. You have given me a better understanding on how best to structure my site. Thank you.
Doug Robertson
Thanks for the great information.
I need to create an index that links a series of posts to one master post. Basicly, a master post and follow on update posts.
Is there a way to create a Tag I can use to organize and link these that can’t be seen by users in the Tag cloud and such?
Any suggestions would be helpful.