To create a collection, you must first install the "Collections” application.
To do this, go to the Apps page via the side menu of your admin space. Click on the thumbnail collection and then in the pop-up, click on Install.
You can then create a collection and add products to it.
To create a collection, go to the listing of your products ("My shop" then "Products" in the header of your admin space) and click the Manage Collections button:
Then click on the “Create a collection” button
You can then choose a name for your collection (it will be displayed in your shop) as well as the products that you want to add to this collection. To do this, click on a product to select it.
If you want to remove a product from a collection, click again on this product to de-select it.
Then confirm the creation of your collection with the "Create the collection” button. This collection will then be put online in your shop.