style="cursor: pointer;"
This means that the mouse pointer becomes the shape of a hand, the same as the mouse pointer placed on the link.
The cursor rule is to set the style of the user's mouse pointer when browsing web pages, that is, the graphic shape of the mouse
cursor: pointer sets the shape of the mouse to a hand with an outstretched index finger, which is also the reason why the mouse stays on the web page link in most browsers In the above style
, you can also choose other mouse pointer styles, commonly used default arrows, crosshair 
crosses, progress arrows and hourglasses, etc.