Having a solid understanding of the traffic and visitor engagement statistics of your blog is one of the best ways to help it grow, and that’s why Google has announced that you can now easily connect your Google Analytics account with your blog.
Adding Google Analytics to your blog will give you more insight into where your visitors are coming from and help you determine which content they engage with the most. It's an easy to use, powerful, free product that is used internationally by businesses large & small.
If you already have a Google Analytics account, simply navigate to your blog’s Settings > Other tab and enter your blog's Google Analytics Web Property ID. Blogger will then insert Google Analytics code into your blog automatically, regardless of which template you're using, including mobile.
You can access all the features of Google Analytics from the Link.
For more details and troubleshooting tips, check out this post on the Blogger Developers Network blog.