The archiving feature allows you to archive apps and placements that are either irrelevant, inactive, or no longer needed.
As most publishers prefer to only see active Apps and Placements, this feature gives you control over what shows front and center on the Inventory Index Page.
You have the ability to archive a single placement under an APP/SITE, or you can elect to archive the entire APP/SITE. If you choose the latter option, all placements that were created under the APP/SITE will automatically be archived.
You can access the Archive to view all APP/SITE and Placements and pull an archived placement back to the Active Inventory Page if you so choose.