What is what does it mean when it says instagram user in dms?

When it says "Instagram user" in DMs, it typically means one of the following:

• A Deleted or Suspended Account: The user who sent the message had their account deleted by themselves or suspended by Instagram for violating its Terms of Service or Community Guidelines. Instagram replaces the username with "Instagram user" to indicate the account is no longer active.
• An Error or Bug: In some rare cases, it could be a temporary glitch or bug within the Instagram app. Refreshing the app or checking your internet connection might resolve this.
• Blocked User: Though less common, if someone blocked you, their name may temporarily appear as "Instagram user" in the DM, although generally, you would no longer see the conversation at all. The more common indication of being blocked is not seeing their profile or posts.
• Privacy Setting Changes (rare): If a user drastically changed their privacy settings, it might, very temporarily, display as "Instagram user" in DMs until your app updates or syncs. This is highly unusual.

The primary and most likely reason for seeing "Instagram user" is account deletion or suspension.