Before sending data to the server, double-check that all needed form controls are completed in the correct format. This is known as client-side form validation, and it ensures that the data submitted meets the criteria specified in the various form controls.
A "technical procedure where a web-form examines if the information provided by a user is correct" is known as form validation. The form will either notify the user that they made a mistake and must correct it before continuing, or the form will be verified and the user will be able to complete their registration.
Increase the website's interactivity and usefulness. Provide easy-to-use and rich features to make the web page more user-friendly. Validates user input before transmitting it to the server, reducing server load. If there is an error in the user data, respond without waiting for the page to reload.