It is incredibly satisfying to see the damage numbers of your favorite troop increase, knowing it will hit the enemy tower slightly harder.

The level of your King Tower dictates the maximum hitpoints and the damage-per-second of all three of your defensive structures (the two Princess towers and the central King tower).
Hitpoints and Damage Breakpoints
To understand the importance of the King level, you must understand the concept of 'breakpoints'—the exact number of hits required for a tower to kill a specific enemy unit.

This single extra shot changes everything. Here's more on tower rush check out our page. If a Goblin Barrel lands on your level 10 tower, those goblins will survive significantly longer, resulting in hundreds of extra points of chip damage over the course of the match.
You cannot rely on your towers to clean up mistakes; you must defend everything manually with troops.Spend your excess gold on leveling level 1 cards to level 6.The King Tower damage also increases. The Psychological Advantage
Beyond the raw mathematics, entering a match with a higher King level provides a massive psychological advantage.

Furthermore, a higher King level allows you to play much more relaxed and patiently.
How to Level Up BaseGold-to-XP RatioUpgrading Cards from Lv 1 to Lv 5Extremely High; costs almost no gold and provides a solid chunk of base XPDonating Rare Cards to ClanmatesMaximum Efficiency; provides you with both Gold AND massive Account XP simultaneously Building the Base
A max-level deck is useless if it is defending a fragile, paper-thin tower.

Reinforce your walls, upgrade your base, and give your troops the sturdy fortress they deserve.