Mike Schaffer is the social media and online marketing manager of an advertising agency that provides digital, branding, and design services. He discusses four truths about measuring return on investment (ROI) for social media: 1) ROI starts with having a clear strategy and goals; 2) choosing the right social media platforms to achieve those goals; 3) maintaining social media efforts requires consistent attention like maintaining a faucet; 4) choosing the proper metrics to measure ROI like website traffic and growth in social media followers. He also addresses common issues with social media like time commitment and offers solutions like using a content calendar for planning posts.