Advertising.com is a digital advertising company founded in 1998 by brothers John and Scott Ferber. It became one of the largest online ad networks globally and was acquired by AOL in 2004. The company started in Baltimore and was known for its innovative approach to digital advertising, employing around 300 people and generating significant revenue growth.

The company operated a digital ad network that connected advertisers with publishers, utilizing a business model based on purchasing ad inventory on a cost-per-thousand-impressions (CPM) basis and selling ads based on performance goals, typically cost-per-click (CPC). Advertising.com developed advanced technologies for ad serving, targeting, analytics, and optimization, enabling data-driven advertising solutions. After its acquisition, it became a key part of AOL's advertising platform, offering tools like Ad Desk for self-service ad buying.

Advertising.com served a diverse range of advertisers, including many top brands, and focused on scalable digital advertising solutions that efficiently targeted large audiences across various digital channels. The company played a significant role in the development of Baltimore's tech ecosystem.