Do you constantly wish for better ways to organize ArcGIS content based on subject matter and descriptive qualities rather than just the item type and last modification date? Do you want to find your roads feature layer with 2012 data rather than looking for layers that were created in 2012?
The April 2018 update of ArcGIS Online* introduced the ability to assign user-defined categories to items, creating thematic parameters that can be used as filters to refine search results and browsing experiences. Content categories enable administrators, group managers and users with the manage categories privilege to build a categorical schema for content that can then be used by members to categorize their items thematically.
Check out the rest of this article here and let us know how you will use content categories in the comments below.