Eating Spinach both Raw and Cooked is healthy for you but it's better to eat cooked spinach since cooked spinach allows your body to absorb higher levels of vitamins A and E, protein, fiber, zinc, thiamin, calcium, and iron.
So if you want to get the best health benefits from spinach it should be cooked and then eaten.
Also cooked spinach is much easier to chew and digest than raw spinach.