Google Analytics is free and can easily be integrated into any website. It generates detailed statistics about a website’s desktop and mobile traffic and traffic sources and measures conversions and sales.
It is important to understand your audience and what interest them the most. Check out Google Analytics get started page to begin using it and for more information on how to integrate it into your website.
Once you have everything set up, or if you already have an account, download the Google Analytics app for free to quickly and easily monitor your website. I warn you, it is addictive, so pick certain times a day to check your stats.