HTML Forms are essential components of web pages that allow users to input data. They are created using the HTML language and can include various elements like text fields, checkboxes, radio buttons, and submit buttons. Forms enable users to provide information, such as names, email addresses, and preferences, which can then be sent to a server for processing. When a user fills out a form and clicks the submit button, the data is typically sent to a server using the HTTP protocol. This data can be processed by server-side scripts, such as those written in PHP or JavaScript, to perform actions like storing information in a database or sending emails.