HTML forms are essential for collecting user input on websites. They are created using the <form> element, which can contain various input fields where users can enter data. Here are some key elements and attributes used in HTML forms:

1. <form>: This element wraps all the input fields and buttons in a form. It can include attributes like action (specifying where to send the form data) and method (indicating the method of sending data, usually “GET” or “POST”).

2. <input>: This versatile element is used for different types of user input. It can be a text box, a checkbox, a radio button, or a submit button. The type attribute defines the type of input (e.g., “text”, “password”, “checkbox”).

3. <label>: This element provides a description for form controls, improving accessibility. It is associated with an input field using the for attribute, which matches the id of the input.

4. <textarea>: This element is used for multi-line text input, such as comments or messages. It does not require a type attribute and is defined by its rows and columns attributes.

5. <select>: This creates a dropdown menu from which users can choose one or more options. The <option> elements inside the <select> define the available choices.

6. <button>: This element can be used for form submission or other actions. It can be configured with different types, such as “submit” (to submit the form) or “reset” (to clear the form).