Could I get an explanation as to how "Shout-Out" works? I understand it at the basest level, but what's the purpose of it? Before setting a shout-out, the message on your profile players to other local/online players. But, afterwards, the shout-out directly replaces the message. If that's the case, why even have the message on the profile? Is there a way to turn off your shout-out, or is it linked to a timer or something?

Image unrelated, but it's about the only thing Pokemon related I have saved.