Facebook and various mobile ad networks
You can search for creatives by app name or tag. Every creative is tagged with a platform: Android or iOS, a creative type: video, image, playable, an ad network (see list below) and one or more categories such as games, lifestyle or tools (full list below)
For example, if you want to look for iOS Puzzle Game Playables you could either search 'ios games puzzle playable' or 'ios, games, puzzle, playable'. These searches would return any creatives that have all 4 tags. The ordering of tags in your search does not matter.
If you searched for "final fantasy" you would get all apps with names that contain "final fantasy" as well as all apps tagged "final" or "fantasy"
Each creative will have a shareable link and buttons to share via Facebook, Twitter, Pinterest or email.
Any boards you create will also be visible to other members of your team. Any member of your team can also add new creatives to any boards you create.