The img HTML element is used to embed images in a webpage, requiring a source URL and supporting attributes like alt text for accessibility.

The iframe HTML element is used to embed another HTML page within the current page, allowing for the integration of external content like videos, maps, or other web pages.

The input HTML element is used to create interactive controls for user input, such as text fields, checkboxes, and radio buttons, enabling data collection and interaction.

The ins HTML element is used to represent text that has been inserted into a document, often displayed with an underline to indicate the addition.

The i HTML element is used to italicize text for stylistic purposes, often conveying a different tone or mood, such as a technical term or a thought.

The kbd HTML element is used to represent user input via a keyboard, typically rendered in a monospace font to distinguish it from other text.

The keygen HTML element was used to generate a key pair for cryptographic purposes within a form, facilitating secure user authentication. However, it is now obsolete and not supported in modern browsers.

The label HTML element is used to define a label for an input element in a form, enhancing accessibility by improving navigation and interaction for users, especially those using assistive technologies.

The legend HTML element is used to provide a caption or title for a fieldset, enhancing the organization and accessibility of grouped form controls.

The link HTML element is used to link external resources to a document, such as stylesheets or prefetch requests, playing a crucial role in defining the document's presentation and behavior.