Servers are able to compile every request for a web page, arming its operator with the information needed to determine how popular the site is and which pages receive the most attention. When a web server processes a file request, it makes an entry in what is known as the “server log” on the server's hard drive. The log gathers entries across posterity, forming a valuable database of information that the site owner can analyze to better understand the website's visitor activity.
Not all web traffic is welcomed. Some companies offer advertising schemes that, in return for increased web traffic (visitors), pay for screen space on the site. There is also "fake traffic", which is bot traffic generated by a third party. This type of traffic can damage a website's reputation, its visibility on Google, and overall domain authority.