Shopify uses Collections as a way to organize your products into related groups or categories.
There are a few different ways to set up categories. Which style are you looking for?
Each style will lead you to a list of all Shopify Themes that have this built-in. The following images are all taken from themes from our Theme Store
1. Display the categories in your menu
2. Display categories through dropdown menus
3. Show the categories on the frontpage
4. Display sub menus or Shop by
