First of all, you need to create an account on iftt and then create a new applet and click on "+this"
Once you've selected location, click on "when you enter an area"
Once you've done this, click on "create action"
This application can be very usefull for parents who are not home and want to know if their kids well arrived at home.
Indeed, a lot of children often forget to text their parents to say "hello i am home" so this API does it for you !
So now, you can go to work peacfully and always know if your child is home !