For newbies, who often don't know (and I suppose oldies if you've missed it.) Flagging on G2G is for bad things not good things. If you like an answer or question, use the up arrow, in the green box, to the left of the question/answer. That's a vote. Use down votes sparingly. Peoples feelings do get hurt.
A flag is used for inappropriate content, such as spam. It calls attention to (/reports) a problem for sysops and leaders so they can remove the offensive content.