Fitts's Law describes how long it takes a user to hit a target in a graphical user interface (GUI) or other design, as a function of size and distance.  Understanding this law helps us design better buttons, forms, lists, and other interactive elements. It’s a useful tool for predicting the time it takes to move from one point to another.

The aim of user interface design should be to reduce the distance from one point to the next and make the target object large enough to enable prompt detection and selection of interactive elements without sacrificing accuracy.

Some Interesting Use-Case:

• Software UI: To reduce the time to click


• Website/ Sales Page: Getting people to buy ASAP