The `pointermove` event is a type of event in web development that occurs when a pointing device, such as a mouse or touch screen, moves over an element on a webpage. This event is part of the Pointer Events API, which allows developers to handle input from various devices in a unified way. It provides information about the position of the pointer and can be used to create interactive features like drag-and-drop or drawing applications. When the `pointermove` event is triggered, it can provide details such as the pointer's coordinates and the type of device being used. Developers can listen for this event to execute specific actions, such as updating the position of an object on the screen or changing the appearance of an element. This enhances user experience by making web applications more responsive to user input.