What is an inline frame?
Think of an inline frame as being like a small window in a Web page, into which you can load another page or image. You can put hyperlinks within the frame, so your site visitors can click a link and alter the frame content, or add hyperlinks on the page surrounding the frame that do the same thing. Why use one? Because an inline frame window can have its own scroll bars, letting users browse a document too big to fit in the window itself, it’s ideal for fitting a text-heavy document — such as a product’s technical specifications or README file, or a license agreement or legal statement — into a small space. Inline frames can also be used for photo albums, product catalogs, or anywhere you want to display a lot of information in a single Web page without making the page too big or unwieldy.
