CHIANG MAI, THAILAND - AUG 17, 2017: A man holds Apple iPhone 6S with facebook application on the screen.facebook is a photo-sharing app for smartphones. facebook is a social network. Shutterstock Image - CHIANG MAI, THAILAND - AUG 17, 2017: A man holds Apple iPhone 6S with facebook application on the screen.facebook is a photo-sharing app for smartphones. facebook is a social network. - ID: 697534177