Collections
There will be times where you don’t need a page or a post, but still need to group bits of content together. This is exactly what collections are: they are groups of documents that aren’t in any particular order.
For each collection, a new directory will be created in your project called _[collection name]/ (e.g., _people/). Additionally, a piece of configuration will be added to your _config.yml file that defines the collection with its title and any metadata attached to it.
Options
Output
By default, a collection’s documents are generated into their own pages when they’re published. It will generate these pages out into children of the parent collection. For example, if you had a document called Ethan in a collection called People, it will generate a page located at /people/ethan.
If you turn this option off, you’ll still be able to access your documents in your layouts through the Collection Liquid attribute. For example, you’d be able to access the documents in the People collection by calling site.people.
Path
Changing the path changes the location of the generated collection directory and the path the collection is accessible at on your site.
Permalink
The permalink changes the path the collection is accessible at on your site.