Can someone tell me what the moon rock / green bacteria below usernames with the 0 / 0 is?

Can someone tell me what the moon rock / green bacteria below usernames with the 0 / 0 is?

Some people have numbers higher than 0 and some just 0 but I don’t get what it is? Can someone explain.

Blah blah blah I wonder if this is 500 characters yet cause I’ve had to remake this post 3 times now. And I’ll go crazy making it a 4th time. Blah blah blah blah blah blahhhhh blah blah blah blahhhhhh. Blah blah blah holy f how many characters is 500 cause I just did this a 4th time now. Can someone tell me what the moon rock / green bacteria below usernames with the 0 / 0 is? Can someone tell me what the moon rock / green bacteria below usernames with the 0 / 0 is? Can someone tell me what the moon rock / green bacteria below usernames with the 0 / 0 is? Can someone tell me what the moon rock / green bacteria below usernames with the 0 / 0 is? BLAHHHHHHHHH