The document discusses HTML form tags. It covers the <form>, <fieldset>, <legend>, <label>, <input>, <select>, <option>, and <textarea> tags. It provides examples of how to use each tag properly, including how to associate <label> tags to <input> fields using "for" and "id" attributes. It also describes the different input types like text, email, radio buttons, checkboxes, and buttons. The document is intended to teach the basics of HTML forms.