A frame is a region in a browser window that can display an HTML document independent of whats being displayed in the rest of the browser window.
A frameset is an HTML file that defines the layout and properties of a set of frames, including the number of frames, the size and placement of the frames, and the URL of the page that initially appears in each frame. The frameset file itself doesnt contain HTML content that displays in a browser, except in the noframes
section (see Handling browsers that cant display frames); the frameset file simply provides information to the browser about how a set of frames should look and what documents should appear in them.
This section covers the following conceptual topics: