A collection is a group of pages.
A collection can only exist when there is a page inside
To create a collection you must create a page first.
Step 1 Create a file.
Step 2 Specify the folder name
A folder for a collection should always start with underscore (_). Replace spaces between words with dashes (-). And always keep all file and folder names in small caps
Step 3 Add a forward slash to fix the folder name and set a file name.
Step 4 Specify the title and permalink of the page and click commit at the bottom of the page to save the file.