Some forms include certain input fields that must be completed in order to submit the form. Such fields should be clearly indicated to the user. This will avoid them submitting the form with information missing and having to return to the form to correct it. One way to achieve this is via the label text.
Include the word required in the label associated with the field (e.g. "Your name [Required]" or use an asterisk (e.g. "Your name*"). If you use an asterisk, make sure to explain the purpose of the asterisk at the top of the form.
// Indicating a required field by including an asterisk in the label text as well as an explanation of what asterisks signify
<p>Required fields are indicated with an asterisk (*) </p>
<form id="Your login details" action="submit.php" method="post">
<label for="name">Your Name *:</label>
<input type="text" name="name" id="name" />
</form>