It’s a way for a computer to ensure no two files have the same name.
Because this file name is just a "serial number" for a file, it could contain anything from a to a screenshot of a grocery list . 8681C4AD-EDFA-46BD-90F6-AE0F8029992F.jpeg
Since I can't see the specific content of that file without you uploading or describing it, I can only guess what it might be based on how those alphanumeric strings are typically used. What this file name likely is: It’s a way for a computer to ensure