Clash of Clans 2015 Update – Clan XP, Clan Level and Clan Perks
Clan Experience Levels!
* Level up your clan by earning Clan XP in Clan Wars
* Clan badges are now adorned with banners that showcase a Clan’s level
* Clan levels grant perks, prestige and fancier badges and banners!
Gameplay balancing and upgrades
* Cannon level 13 packs a punch and takes a lot of damage!
* Healers no longer trigger air traps – just keep clear of Air Defense!
* Clan Castle troop deployment is no longer prevented by tapping on obstacles
Clan Wars Opt-in/Opt-out
* Clan leaders can now pick exactly who to take to every war!
* New profile setting shows other Clan members if you want to go to war
* Choose big or small wars, but larger wars can be worth more Clan XP
Power-up your Clan with Clan Perks
* Request troops more often and donate more troops at a time
* Get refunds and automatic upgrades on donated troops
* Increase your Clan War loot bonus and store more in your Clan Castle
* Clan perks unlock automatically and improve as you level up your Clan!
Clan badge editor
* Craft a clan badge with your choice of pattern, background and border
* Level up your Clan to unlock special borders for your clan badge!
Three ways to get Clan XP in Clan Wars:
* Get small amounts of Clan XP for defeating enemy War Bases
* Get larger amounts of Clan XP for accumulating enough stars during war
* Get a huge Clan XP bonus for winning the war!

Here is a video on “Clan XP & Clan Perks” Clash of clans (Clan War updates) by Godson