AdTaily allows users to easily sell advertising space on their websites. It works by displaying an AdTaily widget on pages that includes a link for advertisers to upload ads. Advertisers can create and pay for ads, which are then instantly displayed on publisher pages. Since launching in 2009, AdTaily has grown to include 9,000 publishers and 500 million monthly pageviews. The presentation concludes by emphasizing the importance of focus, structure, and efficiency for continued growth.