Cindy, Trulia is an advertising website, not a real estate company. Agent profiles are self-written.
Trulia doesn't monitor this forum, so you won't get an answer from them.
You should probably contact Mark directly and ask him how he arrived at 'the most recommended'. As an officer at a local association, seems that's where you would start and it's surprising that you don't know how Trulia works.
OR you're posing as an officer of an association, which is just a weird thing to do.