Sponsorship
From DigitalJargonBuster
Sponsorship is an association with a website in some way that gives an advertiser some particular visibility and advantage above that of run-of-site advertising. When associated with specific content, sponsorship can provide a more targeted audience than run-of-site ad buys. Sponsorship also implies a "synergy and resonance" between the website and the advertiser. Some sponsorships are available as value-added opportunities for advertisers who buy a certain minimum amount of advertising.