Many web analytics services provide very helpful web traffic reports with info such as the quantity of unique visitors to your site, or breakdowns of traffic by geographic location, pages viewed, referring web sites, for example. And many services also offer reports on what terms visitors entered into their search websites, (Google, Yahoo, or MSN Bing), to arrive at your site. They even report on technical information regarding your site's visitors, like what browsers or operating systems they're using. Certain stat counters go even farther, permitting you to truly segment your visitors. Hence for instance, they may offer reports that research only visitors that came from a selected referring site, or only visitors that arrived at your website through a selected advertising campaign, or only those visitors who made purchases. You might even be in a position to get a comprehensive look at how each visitor pages thru your website. If you have got an web business or e-commerce site, you can have your traffic broken down into certain steps, like "who filled out a registration form, who put something in their shopping cart, who got the the checkout page, and who really paid for the service. You can also use an analytics service to trace how well your pay-per-click ( pay per click ) adverts or doing or how well your email campaigns are going so you can make calls on which ones to use more often.
If you go even a step further, you can invest in a web analytic service that not only provides you with the information, but also tells you what to do with it.