Exit Intent is basically, an Internet marketing technology that monitors mouse behavior of website visitors and detects when they are likely to leave the website or web page.
The intention of website readers can easily be read following the direction they push their mouse cursor. When they move their mouse pointer to the close button of the web browser, their intention to close the window is quickly and easily deciphered.
Exit Intent technology comes in at this point to decide what to do with the reader who intends to leave. What generally it does is trigger a lightbox with information intended to hold the reader back from exiting. This lightbox is generally referred to as Exit-Intent Popup.