Training Videos > Social Media Introduction SeriesTwitterTwitter is an online social networking service that enables users to send and read short 140-character messages called “tweets”. It was founded in 2006. Facebook Twitter Instagram Pinterest LinkedIn Periscope Hash Tags SharePinTweetEmailShare Related ResourcesDownload Our 2017 Instagram Planner & WorkbookSocial Media Booster Packs (Instagram Quote Images)Join Our Workshop for More Training & ResourcesNeed a Virtual Assistant or Web Developer? Hire TLC! SharePinTweetEmailShare