This document summarizes research from multiple studies on the impact and effectiveness of digital advertising formats. Original content sites were found to perform better than portals and social media in driving consumer engagement and behavior. Follow up studies also showed that advertising on tablets resulted in better recall and memory than smartphones. Advertising is seen as more acceptable on tablets. For digital magazines, relevance is key, and interactive ads that provide information can be engaging if they don't interrupt the reading experience. Social media also presents opportunities for publishers to strengthen relationships with consumers and promote buzz around brands.