As said there are plenty of threads on this like this one (for HEM) users:
[image: http://cdn2.cardschat.com/images_fb/misc/subscribed.gif] Special 1K post: Hold'em Manager Stat Guide (http://www.cardschat.com/f61/special-1k-post-holdem-manager-stat-166475/)
As a start:
You're 21/10, the first number being vpip (voluntarily put money in pot) 21% of all times (somewhere between loose and tight), 10 is your preflop raise stat (10%).
So what ranges are that ?
Google for "pokerstove" and put the numbers in - then you'll see.