Joining a clan is essential in Clash of Clans. Clans provide donated troops for your Clan Castle (used in both defense and attacks), access to Clan Wars, Clan Games, and the social aspect of strategizing with fellow players. Look for active clans that donate frequently and participate in wars regularly. A good clan dramatically accelerates your progression through troop donations and strategic advice.
Clan Wars are the game's premier competitive feature. Two clans of equal size (15v15, 30v30, etc.) are matched and given a preparation day followed by a war day. Each player gets two attacks to earn stars against enemy bases — three stars for a complete destruction, two for destroying the Town Hall, and one for dealing 50% damage. War strategy involves coordinating attacks with clanmates to maximize total stars. Attack bases you're confident you can three-star rather than always hitting the highest base.
Clan War Leagues (CWL) run monthly, placing your clan in a league tier from Bronze to Champion. Eight clans compete over seven days, with each player getting one attack per war day against a different opponent clan. CWL medals earned from placements are used to purchase valuable items including Hammers (instant upgrades), Books, and other magical items from the League Shop.
Clan Games occur monthly, offering individual and clan-wide challenges that reward magical items, resources, and gems. Every member contributes points toward tier rewards that benefit the entire clan. The Clan Capital is a collaborative building project where clan members contribute Capital Gold to build and upgrade a shared base district. Raid Weekends let clans attack other Clan Capitals cooperatively, earning Raid Medals used to purchase items and resources. Builder Base is a separate village with its own troops, buildings, and versus battles, offering additional progression and rewards that feed back into your main village.