what does the lower case "a" in a tiny blue shield mean?

What does it mean when you invite someone over on your homepage??

when I loook at my advice, under some of my answers it says 100% what does it mean?

Mine says 87% What does this mean? Please explain. Thanks!

A) To honor of the first avoided crash in May 1904 B) It is just something one pilot had come up with C) It is 'm'aidez' in F...

What does mark as annymonous mean?

In the groups section, what does it mean when it says: new replies? I wasn't quite sure. thank you for answering!

"you have firm convictions- stand strong behind hem." its my fortunate lol

When I was clicked View All and was looking over at some of the advice I've given, next to some of them was a 100% in italics...

What does this site mean when this site says that some of the questions are "locked"?

What does it mean when my answer has a rating of 0 to 2? Thnx, Carol