Center (American football)

position in American and Canadian football

Center (C) is a position in American football and Canadian football. The center is the innermost lineman of the offensive line on a football team's offense. The center is also the player who passes (or "snaps") the ball between his legs to the quarterback at the start of each play.

the positioning of a center in an offensive formation.
Creed Humphrey Prepares For A Snap

Besides that centers protect the quarterback and block for the running back during a play.