Carie Lewis is the Director of Emerging Media at The Humane Society of the United States (HSUS). She oversees HSUS's social media strategy and team. HSUS uses social media primarily on Facebook and Twitter to engage supporters, provide customer service, promote its advocacy work, and fundraise. HSUS has over 1.4 million Facebook fans and its social media growth and donations are fully funded through Facebook fundraising. HSUS measures its social media success through actions taken, new donors and names added to its file, customer service responses, growth rates, and content popularity rather than just numbers of followers.