I've recently started coming across a few Facebook users whose profiles boast blue badges containing what appears to be some sort of shield. These display on the lower frame of the user's profile picture, as seen here:
I initially assumed this was related to being some sort of verification process, though Facebook's Help Center article on verification makes no mention of it, indicating that the classic blue tick is the only verification symbol that exists.
What exactly does this badge mean, and how does a user get it?
Best Answer
That blue badge is actually indicator of Facebook's profile picture guard. Using this guard users will be able to control who can download and share their profile pictures.
If a user turns on profile picture guard, the blue shield badge will show on their profile, and it publicly people will not be able to share or download the picture. In some cases it also prevent to take the screenshot of the photo.
Note: This feature isn't available everywhere at this time.
Read this article for more info.