Albums are ways of grouping projects together. They allow you to aggregate your stats and progress from across multiple projects.
Example scenario
You have a North London project and a South London project
You receive funding from the Mayor of London
On each project you record the number of attendees
If you create a Mayor of London Album that contains the two projects, you can see the total number of attendees from across the two projects
Rules & Relationships
A project can be part of many albums
An album can contain many projects
Each album has
Album Editors: users who have permission to rename the album, add/remove projects, add Album Observers
Album Observers: users who have permission to view the album