An iFrame, or inline frame, is an HTML element that allows a webpage to embed another document within it. This means you can display content from another website or a different part of the same site without leaving the current page. iFrames are commonly used for displaying videos, maps, or advertisements. Using an iFrame can enhance user experience by providing additional information or functionality without requiring users to navigate away. However, it's important to ensure that the embedded content is secure and that the source allows its content to be displayed in this way, as some sites may restrict iFrame usage for security reasons.