If you're not familiar, pinned tweets stay at the top of your profile, no matter how old they are. It's a useful feature if you made some important or clever tweet but don't want it to get buried ...

Instagram is exploring a new feature that lets users pin specific posts to their profile. The new feature is currently in the testing phase.

Instagram has released a new "pin-to-profile" feature that lets you pin up to 3 posts or Reels to your grid.