What blasphemy is this, you ask. After all, everyone knows that internet marketing site visitors are people who are seeking information, shopping and coming back to your site for more. Right? Well, in actuality that is not right at all because you are not thinking about what is really going on technologically. SEO Logic in their blog post Web Traffic 101 says:
In a sense, there is no such thing as a site visitor. Instead of saying a person visits a site, it is correct to say that a person's user agent requests files which are retrieved from a website and rendered at the person's personal computer, thus creating the website traffic. The traffic is your site being sent to the person's computer after being invited by a user agent.