For example, Marcus is going on a trip and wants to use Find Wi-Fi to find free, public Wi-Fi at the airport. He has turned on Location services on his device and allowed location access in the Facebook app, so we can use his GPS information to help him find the most relevant public Wi-Fi networks. We'll also use this information to show him ads for local businesses near the airport.

Later, Marcus turns off Location services before he lands, so we don't collect his GPS information anymore. Later on his trip, he opens the Facebook app, and we can use the IP address that we receive to estimate Marcus' general location and show him ads for businesses nearby.