HTTP referer

The HTTP referer (a misspelling of referrer) is an optional HTTP header field that identifies the address of the webpage (i.e., the URI or IRI), which is linked to the resource being requested. By checking the referrer, the new webpage can see where the request originated. In the most common situation, this means that when a user clicks a hyperlink in a web browser, the browser sends a request to the server holding the destination webpage. The request may include the referer field, which indicates the last page the user was on (the one where they clicked the link).

HTTP referer

The HTTP referer (a misspelling of referrer) is an optional HTTP header field that identifies the address of the webpage (i.e., the URI or IRI), which is linked to the resource being requested. By checking the referrer, the new webpage can see where the request originated. In the most common situation, this means that when a user clicks a hyperlink in a web browser, the browser sends a request to the server holding the destination webpage. The request may include the referer field, which indicates the last page the user was on (the one where they clicked the link).