You should use a web counter. The web counter or hit counter is a computer software program that indicates the number of visitors, or hits, a particular webpage has received. Once set up, these counters will be incremented by one every time the web page is accessed in a web browser.

The number is usually displayed as an inline digital image or in plain text. Images may be presented in a variety of fonts, or styles; the classic example is the wheels of an odometer. The counter often is accompanied by the date it was set up or last reset, otherwise it becomes impossible to estimate within what time the number of page loads counted occurred. Most ASP.NET Hosting providers offer web counters in their hosting plans.