Your referrer is:
A referrer, or HTTP referer, is the address of the webpage that linked to the resource being requested. In other words, it's the URL of the page that brought you to the current page. This information is typically sent by web browsers as part of HTTP requests and can be useful for various purposes, including:
However, it's important to note that the referrer information can be modified or blocked for privacy reasons, and some browsers or browser extensions may limit or prevent sending referrer information.