As a web developer or a programmer, you should be aware about the importance of input validations on forms that you are creating in order to be secured in your web or desktop applications.
Why to use validation? Of course, like what I have said, validation is intended to be secure your applications to be different types of hacking or breaching methods being used by hackers. Actually, one common hacking method being today is SQL injection where the hacker gets into your application through the forms that you integrated in the application. Now, combat this kind hacking technique, you need to validate your forms. Does that makes sense to you? I hope so. - DrMODChip