Collections are a simple way to bookmark and curate the things you love.
To create a collection, select 'Save' when viewing a product. You can then either create a new collection with that product or add the product to an existing collection.
Visit your Product Hunt profile to see all of your collections.
Collections are closed, but if you have a product you think would be a good fit for a particular collection, feel free to reach out to them and let them know.
You can also work on collections with others by adding them as a collection curator. You can read more about curators here.