To categorise your products:
- Select "Store" composition;
- Select store and click "Edit products" in right toolbar;
- Select categories for each products;
- (Optional) Select icon in Categories (Filter) section to edit categories;
- Click "Apply".
To show the particular products' category on the specific page:
- Open page where you want to show products’ category in website builder;
- Select "Store" and select "Listing" in right toolbar;
- In "Category" dropdown list choose what category to show on that page.