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.
Vlad
It is rare that a post responds in a consolidated way to so many questions. Yours does and thank you for that. I have a question though in regards to a blogsite structure. Mine has one MOVIE tab and sub-tabs for each movie treatment that I write, one MOVIE SCRIPT category for all that posts about the process of writing those treatments or scripts and multiple tags for each posts, some common to multiple posts. The posts (progressive blog log wise) are strictly related to the writing challenges of each treatment or script. I believe that this structure is user friendly as you rightfully label one sample as such.
Question: How bad or good is my structure though for the SEO?
Thank you,
Fazal
Hi, This post has good information but My concern is: how many words we should use in tags. As you gave example of 1 word like “actor” as a tag. But what if I use: “hollywood actor” “american pop singer”
Please give advise.
WPBeginner Support
Yes, you can use multiple words or a phrase as tag.
Admin
Afzal Hameed
I would like to say thank your for this article, I was only using categories and had posts into multiple categories. Now I have only 5 main categories and separate further using the tags.
once again thank you for this article
WPBeginner Support
Glad you found it helpful.
Admin
Bhushan Nikhar
Very well written article. Thank you for clearing doubts!
Shannon Suitter
Your website is so helpful! Thanks so much for this awesome article. I’m always researching new SEO info, and I always find the best answers here.
Bailey
Finally getting started and learning how it all works, and how to do it well. Thank you so very very much for clearing this up so I can understand! So helpful! I am going to make my first category and get the Yoast plugin now!
Muhammad Ali Pasha
Thanks for this awesome article, this really helped me
Kristin
Thank you for this great article!
This was very helpful!!!
John Thomas
Thanks for a nice post, its very helpful.
John Allan
My research as to whether or not WP has a limit to the number of categories has not helped – many people have asked the question in different forums, with no one providing a definitive answer. I’ve now encountered a situation where it seems that WP won’t allow me to add a post to any more categories, although it doesn’t seem to be limiting the actual number of categories that I can have.
Do you have any suggestions for the best way to handle what I’m trying to do, which is to have the following type of category list for all of the U.S.:
State Name (Parent)
City (child)
City (child)
City (child)
State Name (Parent)
City (child)
City (child)
City (child)
etc.etc.
As I’m sure you can imagine there will be a LOT of categories with one created for every town and city in every state in the U.S.
However, I don’t see a better way to do what I need, and “business directory” plugins and themes that I have looked at so far don’t seem to provide a suitable solution either.
Jaswinder
Very interesting and useful article on the Subject!!
I don’t know much about-Category and Tags, learned a bit and will practice on it.
Thanks.
Saleemiqbal
Thanks, Really good and helping. My one question is how can hide tags given in the categories.
Beth
Nice article! Any thoughts on how to treat tags vs categories in Ghost?
kishore kumar
Hello,mam this is kishore from India.i always follow your advices.but I have one question,how to write article which has h1,h2 & information,as you are aware that in wordpress.it has no column or row features that options.thank you and you are awesome.
Ryan
Awesome post, really useful – i’ve never considered duplication of content through categories and tags.
Our site is a male grooming, lifestyle and men’s fashion blog. Because these subjects are quite broad we have sub categories too. For example, skincare within male grooming.
When we upload skincare articles we add them into skincare and male grooming – does this affect our SEO? Should I put one of them as non index? Or leave it as it is?
If we were to be more specific in regards to skincare, for example acne, should i add this as a sub cat or a tag? FYI, we use acne as a drop down within our skincare menu but using it as a tag shows “tag” in the URL when once clicked on acne.
Any advice would be much appreciated.
WPBeginner Support
You can leave them as is. That wouldn’t affect your SEO.
Admin
baguzinfomedia
I have a wordpress site with many tags. probably around 12,000 tags. with 140 posts. whether many tags will create a negative effect on my wordpress site? because I see my visitor on the wane.
please provide an explanation. if necessary, I will remove my tag
Aisha
Thanks for this article!
I still have a doubt
1. my parent category an the sub category are showing the same post, is there a matter of duplicate content?
2. Also my categories represent a similar class of objects, so the sub categories of most of them are same, again should i worry about duplicate content?
Please give me some advice on the noindex and nofollow thing.
Sanjay Banerjee
Thanks a lot for this post
Poonam
A very useful post. This article gave me a very clear understanding about how should I use categories and tags on my new blog. The suggestion that I should focus on readers instead of search engines makes sense too.
Thanks a lot!
JC
nice sharing. tks
so use caterogies for better blog layout
Nicki Lewis
This was very informative. I am trying to resetup my blog and am going to keep this in mind
Joost
Good post! I have one question. I have a tv series blog and i wrote that you should no index one of the two: categories or tags. Is that true? or can i index both taxonomies?
WPBeginner Support
You can index both taxonomies. However, if they have totally similar posts then this could be treated as duplicate content.
Admin
Lezly
If you create a sub-category, do you put the post in both the parent & sub-cat or just the sub-cat?
Thank you for this helpful article.
LeChat
Hello, thank you for the great article. Really comprehensible.
I have the same question as Lezly. The post will have to be added to both Category & Sub-Cat so the user could either see all posts under Category, or if they wish only see the specific posts of Sub-Cat. Is that correct?
I don’t know about duplicate content & google, from your article it sounds like i have to do some research.
Also, if tags are not used via the search for people to find the article in the blog then i would not use any… would that be a mistake search-wise?
Many thanks.
Tasos Perte Tzortzis
I have a brand new blog / site and now I can understand crystal cleared what is going on with the taxonomies inside WordPress.
I was only using categories and had posts into multiple categories.Now I have only 3 main categories and seperate further using the tags.
Thank you for this article
Tasos
Mohit
Thanks for such a nice info…I have recently created my wordpress Blog and was desperately looking for this info..Thanks again
Betty
Hi … a great article for a beginner like me! I have a question. My blog is about places I have traveled. Every place will be assigned a destination category and an interest (inspiration) category. Here are my categories (every post will be assigned two categories) The structure looks like this
Cat 1:Destination
Sub Cat 1: Africa
Sub Sub Cat 1: Kenya
Sub Sub Cat 2: South Africa
Sub Cat2: United States
Sub Sub Cat 1: Florida
Sub Sub Cat 2: New York
Cat 2: Inspiration
Sub Cat 1: Safari
Sub Cat 2: Beach and Sun
My questions emphasizes mainly on the impact of Archive pages and SEO. So here is my question: in Wordpress when I assign a category for a blog about a safari in Africa — would the categories be (1) Kenya and Safari or (2) Destination, Africa, Kenya, Inspiration, Safari?
I am trying to limit myself to two categories for every post.
Susan
I like Kenya and Safari. But I’d be curious about the path of the final asset.
Suis
Hi, thats a great article thanks a lot. I have a web site that i am writing reviews about health classes in my city. I have health classes(main cat.) > yoga classes (sub) and pilates classes (2nd sub.)
But sometimes, a health center gives yoga and pilates lessons together so i am assigning my post to each category. This is for users, i hope google will not punish my site because of that otherwise do i have chance to see the problem on web master tools?
WPBeginner Staff
Yes if you are using excerpts on the category and tag pages. See this article on full post vs summary on WordPress archive pages.
Ammar
Hey, is it good to index Categories & Tags In Wordpress SEO By yoast for using it in Google Webmaster Tools?
WPBeginner Staff
You change the category slug by editing a single category. Go to Posts > Categories select the category you want to edit and then change its slug. This slug will then be used in the URL. You categories title and slug can be different.
Abinash Mohanty
This is quite useful! I have a question. If I have to define a category name such as “Graphic Design” in two words then what would be the final url look like “graphic-design”? Does it add hyphen in between automatically? Another live example on your site that I came across with the way you have added the category name “WORDPRESS PLUGINS” while on the URL it shows only “plugins”, how did you do that! I wonder if you can help me out with the above 2 questions. Thanks
Jing Cucio
got it. well explained. Thanks!
Stacey Van Horn
Explained in language I could understand … thanks!
guil2209
The meta description for categories depends on the category, right? Why is it asking to write a meta description in Titles & Metas settings then?
J. Kristina
This was very helpful!!
reseo
Question about the site structure.
Let’s say my site is cookies.com (which isn’t – I just try to layout a simple example)
Let’s further say, I build the following categories:
– Sugar Free Cookies
– Gluten Free Cookies
– Vegan Cookies
As we can see, every category has the word “cookies” in it. If I understood the concept right, I should have the following perm structure:
cookies.com/sugar-free-cookies/
cookies.com/gluten-free-cookies/
cookies.com/vegan-cookies/
Question:
Since I do have the word cookies already as my root domain… wouldn’t it be sufficient enough to have the following word structure only:
cookies.com/sugar-free/
cookies.com/gluten-free/
cookies.com/vegan/
Good idea ? Or bad idea ?
Thank you so much for any little help,
appreciate it !
Rustem Gareev
Yes, it’s good idea both for your site users and for SEO
Susan
Agree ^^^. You don’t need to repeat cookies. It’s actually a best practice not to repeat it. Your suspicions are correct.
Caroline Oakes
Thank you. Great post — very helpful!
Tommy
Thanks. Good stuff
Bharat
Really a awesome article with valuable information.
Mike
Hi,
Nice article. And i just wanted to say thank you for this website. This site has become my “go to” whenever I’m looking for answers on Google. Whenever i have questions this site is right up there, that’s cool. I’ve just started using wp to build a personal blog, and a great deal of my required knowledge has come from here. So thank you Syed, very much!!
Mike
Niek
Really interesting article! It helped me out on the right track but I do have a question though
Currently I am creating a wordpress website. I allready developped this website
myself in asp.net, but I no langer have the time to keep up developping it, so I am choosing Wordpress to be my new platform.
My begist issue is how to categorize everything. And I hope some-one can help me out.
I have a lot of content which is related to each other. Here is how my content is related:
Breeds ->
Breed A ->Info about the breed
->Dog Sellers
->Pictures
->Breeding-group
Breed B ->Info about the breed
->Dog Sellers
->Pictures
->Breeding-group
Illnes -> All kind of diseases from which a lot of diseases can be related to a specific breed (So I think tags?)
Training -> All sorts of training abilities which can be breed related (So I think tags?)
My breeds are about 250. So here is where my concern is. How do I have to categorize this? Just as I mentioned above? My main concern is that I have to put in a lot of sub-categories.
(If you take a look at my website as it is now maybe you can understand my concern about how to categorize everything.
Regards,
Monique
WPBeginner Support
You will need to write down a custom importer script for your website.
Admin
Michael McGinnis
If you use link rel=’canonical’, you don’t have to worry about any duplicate content penalty. That meta tag tells Google to use that as the official URL for the page, and to ignore any other URLs that point to it. Canonical URLs have been part of the standard WordPress default themes for years, I think.
Ayaz Mazhar
Thank you!. I am WordPress coder. Your analogy really helped me alot about category and tags concept.
Caroline
Thanks so much for this explaination – I was wondering if it is possible to somehow group posts tagged as specific categories into different sections in a Wordpress site so that it’s not one long stream of posts? For example, the wpbeginner site has tabs/buttons for ‘Recent articles’, ‘popular articles’…how did you guys make the tabs? Are they category/tag based?
Thanks guys!
Drew Taylor
Now i am wondering where to draw the line between sub-categories and tags though, or when to choose one over the other..
Drew Taylor
Very helpful article.. Your book analogy made these concepts very easy to understand..
Swayam Das
You have explained it quite well. Now I was wondering that if I post to multiple categories which has sub-category also. For maybe SEO reasons, I “noindex, follow” the main category. Will this be a problem for indexing my subordinate categories under that main category?
Nico
Hi,
Thanks for an interesting and easy readable article!
I am very new to WP, SEO, so excuse my questions if they are a bit simple, but:
1) What is the link between Categories, Sub-categories, Tags (C,SC,T) and simple ‘keyword-search’ on the website ?
2) And regarding the line before the last paragraph: “The goal is always to make the site as user friendly as possible…” Who is my user?: Readers e.g. privat induviduals who will look for C, SC,T, to reach their point of interest fast and effectively, Marketers e.g. people who want to place ads vis-a-vis C, SC, or T, or Search Engines who wants to match input search with output (also) by way off C,SC, and T? I guess the user point of view will influence how you structure and organize your contents.
3) Are there strategies for organizing for commercial vs private engagement.
With further thought, I guess “Tags” equals “Topic or Subject” and I guess marketers will advertise towards “Topics/Subjects” rather than keywords found through keyword-search mostly relevant for subjective versus generic advertisement. This still, however, requires that you strategize your C,CS, and T, intelligently and efficiently.
Perhaps we can continue the discussion a bit further?
Thanks.
Anthony
Thanks! Very helpful. I was and still am concerned about the duplicate content issue and am probably going to stick with one category for each article I write while having multiple tags. I think SEO-wise this is the best strategy. Google has been very aggressive about duplicate content and I have been personally penalized for duplicate content on other sites.
Single Category / Multiple Tags. I feel in my gut that this is the way to go.
Nicolas
Thank you, really instructive and really helping.
You just solved a big issue I have every time I start a new blog – plus you gave me something priceless: the importance of NOT bothering too much with categories and tags at the beginning of a blog!
Cheers!