Roughly half the world's websites use some form of web analytics software. An estimated 80 percent of those use Google Analytics. If you're one of the millions using Google Analytics, then you are, sooner or later, moving to Universal Analytics.
After a year's testing with early adopters, Google is now migrating everyone to Universal Analytics. Some are being invited, while everyone else will simply find the option available in their Google Analytics admin system at some stage. At a certain time, yet to be determined, everyone who hasn't moved themselves to Universal Analytics will be moved across by Google.
So what do you need to know?