There are numerous shady websites, whose goal is not to provide its users with valuable content but to hijack their Web browser notifications. The administrators of such dodgy pages generate revenue by flooding users with unwanted ads. One of these low-quality websites is the Ouristandrel.club page.
When you try to view the Ouristandrel.club site's content, you will likely be asked to complete a security test. The Ouristandrel.club page will claim that you need to complete the CAPTCHA test to prove that you are not a robot. However, if you complete the test as instructed by the Ouristandrel.club site, you will permit this shady site to send you notifications via your Web browser's notifications. This will result in ad-spam initiated by the Ouristandrel.club page. Some of the advertisements that the Ouristandrel.club site would present its users with may promote low-quality, overpriced services, and products.
If you want to prevent the Ouristandrel.club page from spamming you with advertisements constantly, you should open the configurations of your Web browser and revoke all permissions granted to this site.