You have to have permission to create a collection. To verify you have permission to create a collection, select your username and select My Profile. Scroll to the Permissions section and confirm Create New Collections is checked.
To delete a single collection or multiple collections, go to Home > Collections.
To delete a single Collection, go to Collections.
On the Collections tab, select the 3-dot menu next to the collection you want to delete.
Select Delete. To confirm, select Delete.
To delete multiple collections at once, go to Collections.
On the Collections tab, select the checkbox next to the collections you want to delete.
Select Delete in the upper right corner of the Collections table. To confirm, select Delete.