How to add the "required" attributes

To prevent a user from submitting your form when required information is missing, you need to add the required attribute to an input element. There’s no need to set a value to the required attribute. Instead, just add the word required to the input element, making sure there is space between it and other attributes.

i can’t seem to understand

If you have a question about a specific challenge as it relates to your written code for that challenge and need some help, click the Ask for Help button located on the challenge (it looks like a question mark). This button only appears if you have tried to submit an answer at least three times.

The Ask for Help button will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.

Thank you.

What have you tried so far? What does your input element look like?