Google Universal Analytics uses a cookie to uniquely identify you so that your visit to the site can be tracked from page to page and so that it knows whether you are a new or returning visitor. This information helps me to understand how people use the website and therefore improve it. I have not selected Analytics options to share the data with anyone else. I have not selected Analytics options that enable "Demographics and Interest Reports" which report on your likely gender, age and interests. Please see Google's site for more information about the Google Analytics cookie.
Various cookies are created on your machine through the advertising. These cookies help the advertisers track you and target the most appropriate adverts at you. On pages with adverts you may initially be asked to provide consent; you can update your settings via the link in the footer.
This website itself collects no data about you (other than the anonymous data described above for Google Universal Analytics). The Morse Code Trainer does have a form requesting your call-sign etc but that data stays in the web browser and is not sent to nor stored on any server. If you send a message to a friend from the Morse Code Translator then the message is recorded in a web server log file.