It is common to display related products on Shopify's product information page, but links to the collections that the products belong to are also useful for increasing navigation. You can also display all the links that belong to a collection in a list, so here is an example of how to set it up.
How to list all collections that a product is in on a product detail page
[Setup Procedure] Add the "Customized Liquid" block to "Product Information" and insert the code
