advertiser
n. countable B2 Upper Intermediate US //ˈædvɝˌtaɪzɝ// UK //ˈædvətˌaɪzɐ// ad·ver·tis·er
n. a person or company that pays to show ads for their products or services.
n. an individual or organization that purchases advertising space or time to promote goods, services, or ideas.
The advertiser bought a spot on the evening news.
The local advertiser sponsored the community football team to reach more families.
The advertiser carefully targeted its digital campaign to users who had previously shown interest in similar products.
From advertise + -er.