If you have a website.............

[LieselVentouse]

Can you check who clicks on it?

Don't know, liesel. Dp will and if you don't get an answer by the time I talk to him, I'll ask him

It depends what you mean. Without some login page you can't get too much info, but Google Analytics provide web stats, including where in the world your visitors are based.
Google Analytics

Your hosting provider might allow you to access the server access logs. These will tell you some information about what pages were visited, the date / time, and the address / domain of the computer being used. It can't tell you specifically which individual is visiting your site though.