WordPress Categories Explained: How Many to Use, How to Set Them Up, and Best Practices

WordPress categories are a built-in taxonomy system for organizing content. Used well, they improve navigation, SEO, and user experience.

Categories vs. Tags

Categories are broad groupings (like chapters). They are hierarchical. Tags are specific descriptors (like index entries). They are non-hierarchical.

How Many Categories Should You Have?

The Ideal Range: 5-10

For most blogs, this provides the right balance between organization and simplicity.

Signs You Have Too Many

Multiple categories with only 1-2 posts, significant overlap, and excessive navigation space.

Signs You Have Too Few

Categories so broad they do not help visitors, and posts covering wildly different topics within one category.

Setting Up Categories

Navigate to Posts > Categories. Add a name, optional slug, optional parent category, and description. Assign 1-2 categories per post.

Category SEO Best Practices

Use Descriptive Names

"Digital Marketing" is better than "Marketing Stuff."

Optimize Category Archive Pages

Add descriptive text to category descriptions.

Avoid Thin Category Pages

Consolidate small categories into broader ones.

Use a Logical Hierarchy

Keep hierarchy shallow -- two levels deep at most.

Common Mistakes

1. Using categories as tags -- creating dozens of very specific categories
2. Ignoring the "Uncategorized" default
3. Assigning every post to 5+ categories
4. Creating categories speculatively without planned content
5. Never auditing categories as content strategy evolves