Thought maybe it meant messages, but checked and it says no messages. What's it mean?

Basically, it's a red box within the Titleist Logo Icon on my computer that is within a black box with a ball in it and as stated in the title, there is the number 3 in white and a couple of days ago it was a 2. I tried cutting the image and pasting it on here, but it won't let me.

Any ideas how to get rid of it or can someone point to a category or where ever this is trying to take me.