Launched in 2012, Google Universal Analytics came out of beta in April 2014. For those of us who had been using the original Google Analytics (now called Google Classic Analytics), Google first gave us the choice to upgrade. But eventually, Google decided to sunset Classic Analytics, and all sites were required to upgrade to Universal Analytics. If site owners didn’t upgrade manually, Google would automatically upgrade the sites. At this point, Google has now upgraded all properties to Universal Analytics. Universal and Classic Analytics differ in how they track site sessions by default. While both versions of Google Analytics defaulted the session timeout to 30 minutes, Classic Analytics did not trigger a new session when the session arrived from a referral. So what does that mean? Get the full story at Search Engine Land