The iframe tag in HTML is used to embed another document within the current HTML document. This can be used to insert content from another source such as a map, a video, a webpage, or a document, into a frame within the current webpage. The syntax for an iframe is where the URL is the source document that is to be embedded in the webpage. The iframe tag also has several attributes like height, width, frameBorder etc. to adjust the frame according to the needs.
