As website owners, it is important to let visitors know if a webpage or website is not relevant to our niche. We can achieve this by displaying a message or pop-up that explains why the information may not be useful. We can also provide alternative resources or links to related content to guide visitors to the information they need. It is important to ensure that the warning message or pop-up is not intrusive, and visitors should feel welcome on our website. By doing so, we can maintain the relevance and integrity of our website and help visitors find the information they need.