The server is sending your users content along with some HTTP Response Headers. Some of those headers is called Security Headers since they strengthen your application security. Only one little problem; you have to add them yourself. Statistics indicates that they are barely used. Let us change that!
Learn what headers you can implement and what to consider when doing that. We will not go into details on how to implement them, that is fairly easy and dependent on your choice of platform and programming language. But as long as you have an http response to send out the headers name and values is the same.