promoter

One that promotes, especially an active supporter or advocate.

A financial and publicity organizer, as of a boxing match or an artistic performance.

The region of an operon that acts as the initial binding site for RNA polymerase.

One who or that which promotes, forwards, or advances; an encourager: as. a promoter of charity.

One who aids in promoting some financial undertaking; one engaged in getting up a joint-stock company; one who makes it his business to assist in the organization and capitalizing of corporations.