Noreferrer is an attribute of security that can be appended to a hyperlink, hence disallowing the referring website to be transferred to the linked website. This is primarily employed for privacy so that the linked website would be unaware of where the visitor was coming from. Also employed while linking to untrusted sources because it disallows referrer information to get revealed over possibly malicious websites. If rel=”noreferrer” attribute is applied, the browser won’t send the Referrer header with the request to the preferred site.