What you need to know
A category page should explain its product group, provide useful filters, and link to products with descriptive labels. Distinct categories can help shoppers; thin keyword variants add little.
How to apply it
Choose categories around shopping behavior, write an original introduction where useful, keep filters mobile-friendly, and decide whether filtered URLs should be indexed.
Common mistake to avoid
Near-identical category pages can confuse users and waste crawl attention. Keep categories that support real browsing tasks.