OK, something strange happened in my notifications this evening. The notification for boosts on one of my posts had a blue frame around it. It was the only notification that had this and only for a short time. I have never seen this and it is gone now but I did get a screen shot. This is on safari with glitch desktop.

Has anyone else seen this?

First screenshot is now. Second screenshot was an hour ago.

*UPDATE: I am an idiot. Thank you to every other person on here for educating me.

I learned something and I appreciate that very much.