Google had the highest social engagement during the Super Bowl period and on game day based on mentions. Doritos had the most positive sentiment overall and on game day. Twitter was the most used channel. The document discusses various metrics for analyzing brands' social media performance during the Super Bowl including social engagement index, sentiment index, cost per social impression, longevity index, and aggregate reach. It finds that social media can significantly increase awareness of brands and extend the lifespan of advertising campaigns.