Sree Sreenivasan: Social media tips from NY's new chief digital officer
Indian-American Sree Sreenivasan has been called one of the most influential people on social media.
Up until recently he was at New York's Metropolitan Museum of Art, where he banned selfie sticks and created the museum's much-lauded app.
This week - after crowdsourcing what his next job should be on Facebook - he started as the new chief digital officer of New York City. We asked him his top tips for social media users.