Google Analytics

Google Analytics is one of Google Products used to track your visitors statistic of your websites. They can trace your visitors based on their referrals, including search engine, ads, campaign, ppc (pay-per-click) network, email marketing and a link on a PDF document.

If Google Analytics were integrated with AdWords, they also can be used to analyst the effectivity of AdWords advertise on Google.

With Google Analytics, you can view your visitors keywords that they used to visit your websites, trace from where they are, what platform they are using and make a traffic report in daily, weekly and monthly range. This service can be access through google[dot]com[slash]analytics.