How do you know if something is legitimate or not?

To determine if something is legitimate, check for credible sources and verify the information against reputable institutions. Look for reviews or testimonials from reliable users and assess the presence of clear contact information and terms of service. Additionally, consider the quality of the presentation; professional and well-organized content is often a good sign of legitimacy. Lastly, trust your instincts—if something feels off or too good to be true, it often is.