Barack Obama's Organizing for America group utilized digital tools and tactics like calls, letters, petitions, and social media posts to mobilize citizens and transform their opinions, relationships, votes, creativity, and money into political and social change. They aimed to directly influence decision makers through "speak up" tactics or influence the public through "speak out" tactics, and build long-term grassroots power through organizing. Over four years, the group contacted millions of officials, held thousands of events, trained volunteer leaders, and raised over $30 million.