When elements are related to each other, it is beneficial to group them as it helps the user to better comprehend the form, and it allows them to concentrate on smaller, structured sets of fields rather than attempting to understand the entire form at once. Grouping can be accomplished both visually on the interface and logically in the code.

fieldset and legend elements

To group several related form elements together, we use the <fieldset> element. It provides a container for these elements, and we can add a group title using the nested <legend> element. It is important to group related radio buttons and checkboxes, and other field types can also be grouped as necessary. This helps improve the organization and clarity of the form for the user.