The form is used to send the data inputted by the user.
<form> - </form>
The form can contain multiple fields necessary for the input.
For example,
<form method="POST" action="cgi-bin/formmail.cgi">
Name : <input type="text" name="name">
E-Mail : <input type="text" name="email">
<input type="submit" value="Send">
</form>
This form cannot submit because of a sample.