{i} promoter, one who publicizes (generally in order to sell goods or services); person whose business is advertizing; adman; one who publicly announces (also advertiser)
entity seeking to sell something through a display; for example, a single business with a display on a webpage; or, a group of companies acting with an ad agency to present displays on a webpage
{i} promoter, one who publicizes (generally in order to sell goods or services); person whose business is advertising; adman; one who publicly announces (also advertizer)