maybe this technique could be used in a pizza delivery app.
for example you have 5 orders and you need to find the shortest path for the pizza deliverer so this algorithm will calculate the shortest distance between
the dots and give you the fastest route for the delivery. of course it need to be modified a little bit.
but i believe google maps got already his "calculate shortest route" function.
(have not used google maps until now so don't know if it got such a function)