Learn about traffic source/medium, campaign timeout, channels, utm tags, direct traffic, "dark social" and the Google Analytics last non-direct click model which can totally freak you out. ► 00:30 Traffic is document.referrer from another site ► 02:50 Source / medium ► 07:30 UTM tags explained ► 10:02 CAMPAIGN TIMEOUT: Last non-direct click special case in Google Analytics. How GA turns direct into the last known traffic source ► 13:24 New traffic source creates a new session ► 13:37 EXAMPLE Traffic source attribution with direct and new traffic sources ► 16:53 E-mail can be direct traffic ► 17:52 Direct can be "dark social" ► 18:33 EXAMPLE How to use UTM tags ► 22:34 Traffic channels UTM Tags Campaign Builder support.google.com/analytics/answer/1033867?hl=en Technical help article on how GA processes document.referrer and UTM tags into traffic sources support.google.com/analytics/answer/6205762?hl=en#understanding -- This is part of a series on the Basics of Google Analytics, see other episodes in the playlist: www.youtube.com/playlist?list=PLW9qU3b0FSd2GnPS2iCDmJoe_EBJJmDKz