Collections
Build deliberate groups of published content.
Collections group content for browsing without changing whether an item is a Page or Post.
Use a Collection when
You need a curated group such as Guides, Case Studies or Featured Work and a normal Category or Tag does not describe the relationship.
Manage membership
Open Content → Collections to create the Collection and manage which content belongs to it.
Public archives
Collections can have public archive routes. Check the active Archive Template and Site Design archive defaults so the group is presented consistently.