Google Analytics is a free website analytics service offered by Google regardless of what program the website was written in. It tracks and reports website traffic in a variety of ways including where visitors come from geographically, which pages are the most popular and how much time people are spending on the website. Website traffic can also be tracked and compared over any time period such as quarter over quarter or year over year. This type of tracking and data review is used to make changes to the website that maximize visitors and effectiveness. Google analytics is now the most widely used web analytics service on the internet today.