Zeus, the Lord of Heaven, is a ranged intelligence hero who functions almost solely as a nuker. He is usually played as a semi-carry ganker type hero, who instead of utilizing disables, focuses solely on delivering tremendous amounts of magical damage to his foes. With the high cast range and ease of use and low cooldown on his spells, he is able to deliver the most superb and consistent magical damage of any hero in the game. Arc Lightning is a highly spammable nuke that creates a stream of lightning that bounces between enemy foes (up to fifteen times at max level), dealing minor damage. Lightning Bolt is more focused, dealing heavy damage to a single target, also on a very low cooldown. It can also be targeted on the ground, providing vision and True Sight and potentially striking a nearby enemy, making him effective even against fogged and invisible enemies as well and allowing him to locate enemy wards. Static Field is a potent passive ability that allows Zeus’s magical damage to scale into the late game, dealing damage to all enemies within a decent.
AoE equal to a certain percentage of nearby targets’ health whenever he casts a spell. Finally, his ultimate Thundergod’s Wrath allows him to strike all enemy heroes with a bolt of lightning, no matter their position, inflicting heavy damage. It can be used for multiple purposes: to finish off low-health enemy heroes limping away, to soften up the entire enemy team during a team fight, or even to scout out the enemy’s position. With the ability to strike down enemies both near and afar, the Lord of Heaven ensures that nobody can escape his wrath.*
Resource – DOTA2 Wiki