what is a tiled player???
"Titled" players have an official chess title from an over-the-board organization. Grandmaster (GM) is the highest chess title one can achieve (other than World Champion if this counts, or the informal "super-GM" status of 2700+ rating).
Basically, a "titled player" is like a chess "professional" in ability.

am i the only one to not know about tiled players?!?!?!
they're people who have titles, either granted by FIDE or another chess federation. They look like a red box with two or three letters in them, like [NM] kracker12345. They also get free Chess.com Diamond