I don't collect any personal information about this website's visitors.
As with most websites, data is collected in the web server log files. This is a commonly accepted practice and includes data such as web pages requested, date and time of request, the type of web browser used, the visitor's IP address, the web page that referred the user to this website (if any), etc. This information can be used for determining things such as how popular the website is, whether traffic is increasing or decreasing over a period of time, which pages visitors find useful, the websites the traffic is coming from etc. It can also be used for diagnostics purposes (for example, troubleshooting an error), and it can be used for security purposes (for example, analyzing unusual traffic in the event of a DDOS attack, etc).