Products
When going to Products you'll see all the products (listings) from your store. You'll easily identify if they are already connected with Customily or not. By selecting a product, you'll be able to connect it with a Template to add personalization to it.
Option Sets
Option Sets are the personalization options your product will have. When manually connecting a product to a Template, you'll also assign to it an Option Set (although this is done automatically most of the time, so you don't need to stress about it!).
These Option Sets are the actual swatches, dropdown menus, and text inputs that shoppers will see when they view your product. So, if you want to modify any of these options (such as making a particular option required or changing its title), this is the place to do it.
Important
"Store" is only available for Shopify, WooCommerce, and Etsy stores. If you are using a different eCommerce platform, head over to integrations to see where to find Store functionalities inside your App.