Controlling the "All products" collection
By default, Shopify creates an "all products" collection, which contains all the products in your store. This collection is not visible from the "Collections" part of the admin, which makes it impossible for merchants to control the title, image, or content.
Hopefully, there is a simple trick to control this page. To do that, open the Shopify admin > "Collections" and create a new collection.
You must name the collection "All" (exactly All, nothing more, nothing else). Then, create a condition and select a broad condition to include all products, such as 'Price > 0'. Here is how it should look:

After you have created the collection, you can rename it to something else (make sure NOT to rename the handle of the collection, though; it must remain "all").