Have you ever been to a meetup or small conference, looking to talk to people with a certain interest but out of 40 people, you only get time to speak to 4? Thereby missing out on possible valuable conversations.
The app solves this problem*
Instantly attendees get access to a group chat. No one has to set it up, no one has to add others. Only people who are/did attending get access, no random unaffiliated people.
It "just works" solution.
Current solutions are sub optimal and they involves virtual schlep and so people don't use them.
*this is one use case, but there are broader uses cases where you would use it every single day.