Gathering = Coming together as the larger church body for worship.
Scattering = Going out to the world.
Here’s how the V3 movement describes how much you need:
Scattering for mission works best in the community when you couple it with regular gatherings where people can give testimonies, share challenges, and be inspired through friendships and visionary leadership. Only your more entrepreneurial people will be able to go for extended periods of scattering without gathering. On average, most people need a good blend of both. Without regular gatherings, people feel isolated and fragmented. You don’t want to dice up the community for the sake of mission. You can do both gathered and scattered, and do them both well.