The HTML5 <input> attribute allows you to display a hint value describing what is expected as the field value in a form.
<orm action="/action_page.php">
<input type="text" name="fname" placeholder="First name">
<input type="text" name="lname" placeholder="Last name">
<input type="submit" value="Submit">
</form>
This attribute works on the following types of entries: text, phone, email, url, search and password.