It means tweet more and RT from lots of diverse accounts.
On a related topic if you are curious where, approximately, you fall in twitter rankings (With 1 having the most followers) then undertake this sum.
Code:
exp(21 – 1.1*log(YOURFOLLOWERS)
replacing YOURFOLLOWERS with your follower count.
If you are thick like me, then pop over to WolframAlpha & get them to do the math for you