How to make the user fill out all required fields when signing up

1. How do you make all fields in a form mandatory?
2. What is fields marked with * are mandatory?

How do you make all fields in a form mandatory?

Required attribute: If you want to make an input mandatory to be entered by the user, you can use the required attribute. This attribute can be used with any input type such as email, URL, text, file, password, checkbox, radio, etc. This can help to make any input field mandatory.

What is fields marked with * are mandatory?

Fields marked with * are mandatory

Using an asterisk (*) symbol content authors notify mandatory field. This is said to be one of the accessible modes of identifying a mandatory field, however this method also will be a problem with screen readers in certain times.