TheBlue Checkmark on Etherscan lets people know that this is a Token Account of public interest.

The Checkmark appears next to :

a.  The [left] Summary tag on the Token Info page

b.  Autolookup search results [most right]

What types of tokens gets the Blue Checkmark?

A token contract may receive a blue checkmark if it is determined (at our discretion) to be an account of public interest. 

A Checkmark does not imply an endorsement by Etherscan.