A social feed page is a collaborative space, so now and then something gets posted that you would rather was not there — an autocorrect disaster, a photo that does not belong. As an app admin you can remove any post or comment, whoever wrote it.
This applies to Social Feed, Announcements and Crowd Pics pages.
From your phone or tablet
Make sure you are logged in as the account owner or a team member, then:
Tap the three dots menu on the post or comment.
Tap Delete.
Confirm. The post disappears from everybody else's app the next time they open that page.
On a grid layout, the three dots are in the top right of the photo.
The same menu also offers a broadcast option, which turns a post into a push notification to everyone.
From the Editor
You can also do this at a desk. Open the post in the Editor and use the trash can icon, or the three dots menu next to a comment. See Social Feed moderation, which also covers approving posts before they appear and removing somebody from your app entirely.
Approving posts instead of removing them
If you would rather check posts before anybody sees them, Team plan apps can hold them for approval. That is in Social Feed moderation.
Deleting something you posted yourself
Anybody can remove their own posts and comments, admin or not — see editing and deleting your own posts and comments.