While salting your pasta water, the goal is to add enough salt to impart flavor but not overdo it. Start by adding a teaspoon of salt per four cups of water.
The saltiness should be detectable, but not so intense that it turns your mouth inside out. Aim for a similar level of seasoning as you’d want in a soup.
The amount of salt will also vary depending on the dish you’re making. If the recipe is heavy on salty, briny notes, you may want to salt the water just a touch less.