Google analytics is a tool where you can track your visitors.
it can help you see from where the traffic is coming, what are customers looking for expamle if bounce rate is low, you are doing well.
By the details it gives for your site you can know where you need to improve so you can get more traffic.
Google analytics interface is free which provide detail report of your website:-
1) From which country visitors are coming to your website?
2) What and how many pages they are visiting on your website?
3) At what time they are visiting your website?
3) You can also see whether they are coming from Google or any other Search Engine to your website or direct type website URL.
And much more.
Google analytics do not help to improve website ranking. It helps to analyze traffic behavior for your website. Inserting the Google analytics code into the webpage source helps Google to track the website traffic and provide various information about the traffic behavior in the analytics tool. It also provides information about the bounce rate of your website.
When i compared awstats and google analytics to check my website traffic. Awstats showed more traffic than google analytics. The results displayed by both do not match. Which one shows the accurate and correct result.