YouTube allows over 1200 million people to view videos each month. Advertisers can choose from different ad formats like skippable in-stream ads (charged only if over 30 seconds), non-skippable standard ads, in-search ads, in-display ads, and companion banner ads. Advertisers can target ads based on audience interests to increase relevance. The document provides information on different YouTube ad types, formats, pricing models, and call-to-action options.