Back in December, Google announced the launch of their Asynchronous tracking code. This code update was optional and a great alternative for sites struggling to reduce their page load time as the code loads faster than the traditional javascript tracking.
As of last week we noticed that the asynchronous tracking code was now the default code in our Google Analytics settings.
For now, I would recommend updating to the new code, as it’s definitely not going to hurt anything in your reports. Note that this code does need to go immediately after the opening <body> tag – not before the closing </body> tag as all other previous code variations.