Secureform.xyz, despite its name, has nothing to do with security. Instead, the site's main purpose is the delivery of dubious content to its users and the attempt to convince them to subscribe to its push notification services. While this is a legitimate feature allowing sites to deliver timely updates to users about relevant topics or developments, it has also been used as a part of a popular browser-based tactic.
Countless questionable pages show clickbait or misleading messages to mask their true intentions and lure users into subscribing under various false pretenses. Many create the impression that they are doing a CAPTCHA check or clicking the shown 'Allow' button will result in users gaining access to additional content.
Of course, none of that is true. In reality, users will be subscribing to the site's push notifications unknowingly and then become susceptible to receiving various untrustworthy advertisements. As for Secureform.xyz in particular, the page has been observed to display adult-oriented content that most likely leads to suspicious third-party websites.
Users are advised to avoid interacting either with Secureform.xyz or the advertisements that it generates or risk being taken to additional hoax websites, fake giveaways, phishing schemes and more.