As United Way of Miami-Dade’s one-person social media team, Shairy Gonzalez has to be nimble enough to address different audiences from day to day or even moment to moment. She might attend a fundraising event with corporate movers and shakers in the morning, and later get her hands dirty at a volunteer site in the afternoon. Gonzalez, who will speak at the upcoming Digital and Marketing Show in Miami, October 17-19, shared some examples of how she engages vastly different audiences on social media.