The accent is important because it changes the pronunciation of the word. Without the accent, "Chez" would be pronounced like "shay," but with the accent, it's pronounced like "sheh."
Here's a breakdown of the pronunciation:
* Ch: Pronounced like the "ch" in "chair"
* è: Pronounced like the "e" in "bed" or "said"
* z: Pronounced like the "z" in "zebra"