Also known as a modal window.
An area on a webpage which loads overtop of the content, but is not a pop-up.
A user doesn’t need to perform any action to open the modal. It automatically opens in the same window as the webpage.
A modal is different from a pop-up in that a pop-up appears in a separate window, once the user has landed on the page. A pop-up can also be closed, where as a modal only disappears when the user has clicked or interacted with it.