When tapping on it, you will get a bunch of commonly used emoji and frequent queries and phrases like “Where are you?” and “On my way!”. There is also a button to send your location. You can tap any of these to quickly send them to your recipient. Alternatively, there is an option to type out a short message. The receiver of the message will get message flashed on the screen and from there they get the same options as before to quickly reply back with minimal taps.
Note that Flash messaging is not a replacement to traditional IM or SMS messaging but rather a way to get to someone in a jiffy without typing out long messages. On Android, the incoming message also takes up your entire screen like a call would so it’s hard to miss. Ideal for emergencies or when the elaborate conversation isn’t possible, like during a meeting.