This question already has an answer here:  Let's say user A has
received different milestones. Does StackOverflow have any ways
of identifying that this user A now belongs to an expert
community for this specific subject?  share|improve this
question Hi, I think it doesn't have that answer. It's not about
no. of badges, but what no. of badges when you get declare you
that you are expert? Is there some system in SO? That was my
question, could you please read first before down-voting?? – 
Barun Bashyal Jul 23 '13 at 12:28 Tag badges is the sum total of
what Stack Overflow has towards identifying anyone as an expert.
–  Martijn Pieters Jul 23 '13 at 12:30 expert in field == at
least 5% of Jon Skeet's rep. =) –  Charles Caldwell Jul 23 '13
at 12:30 But, my question is.. can you declare that you have "x"
amount of tag-badges and then you are "expert"? Does SO have
that system provided? That was my question –  Barun Bashyal Jul
23 '13 at 12:31 Martijin Pieters.. can I down-vote your comment?
Seems you don't read q