Sync Categories to WP Posts or Generate missing Slugs for Active Categories (Both functions are used in SEO or Search Engine Optimization).
Utilities Tab
From the Catalog > Categories > Utilities tab, there are 2 buttons:

Sync Categories to WP Posts

This will synchronize your Categories with posts in VF Category Pages. Any duplicate posts will be removed, and any old posts will be refreshed.

Generate Missing Slugs for Active Categories

This will generate SEO-friendly slugs for categories that don't have slugs. Any existing slugs will not be replaced.