Karlie here from the Shopify Support Team! It sounds like you're looking for information on how to create a collection for your online storefront. There are two ways to set up collections, you can either do so automatically or manually. A collection is a way to set up categories for your products online, it is also a way to keep things organized.
To create a collection automatically, you can follow the below instructions:
To create a collection manually, you're going to follow the instructions below:
I hope this has answered your question. If not, or if you have any further questions please let me know. I will be happy to help!