In the "Product" section you will find "Product List" and "Collection List" tabs.
In the "Product List" tab there is a list of products from your store. You can customize each of them with Buildify help.
- Click on the appropriate product and its page will be opened in Buildify editor window.
- On the right side of the window choose widgets to customize the page.
The same steps you can do with collections in the "Collection List".