Training Videos > Social Media Introduction SeriesLinkedInLinkedIn is a business-oriented social networking service. Founded in December 2002 and launched on May 5, 2003, it is mainly used for professional networking. 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