It’s easy! To Create a Collection, you can go to the bottom of the left-hand navigation and select Create > Collection.
From there, you will be prompted to name the Collection and add a tagline (optional).
You can also create a Collection by going to Admin > Navigation and Spaces > Collection List and selecting the "Create Collection"
You can have a maximum of 30 Collections in a Mighty Network. Next, you will want to add Spaces to your Collection.
To manage your Collections, check out the article “How Do I Manage My Collections?”