Provides a small boost to the health, attack and range of all troops and buildings.
Strategy
Offensive
Destroying a temple will destroy all of the associated houses.
It is unlikely for a base to be heavily invested in Zeus Houses, that being said, if this is the case, prioritizing Zeus' Temple is a solid attack plan.
Defensive
As the enemy must destroy all of your temples to win, place the temple in a well-defended or hard-to-reach location.
Zeus' power positively affects everything in your city's defense one way or another but the effect is minimal.