Clash Mini Clans
Mini Clans are a Clash Mini feature that allows you to play together with a community of people. On the Clan page, you're able to Create or Join a clan. Creating a Clan costs 1000 coins but you can join another Clan for free. Once you're in a Clan, there are 2 main features: Raids and Chat.
The Chat page is what you'd expect it to be: a place where you can talk to other members of your clan. You can use this to communicate things like encouraging other members to fight the Raid Boss. The Raid feature is where members work together to bring down a mighty foe together, granting rewards to all participants.