Just to be clear. There are Salt water pools and there are pools with "salt systems". The two are very different and most people confuse them.
A salt water pool is just that... a pool that uses salt water. One adds salt, amongst other chemicals to its filtration in order to stabilize the water. Note, salt water pools are not chemical free and DO NOT TAKE CARE OF THEMSELVES. Typically these are much more complicated systems and most people are referring to "salt systems" when they talk about salt water pools, "Salt systems" are not really salt water pools.
A "Salt System" is a pool that uses salt in a system that converts it to chlorine. It is a chlorine generator. You don't use traditional chlorine tabs in your pool but rather use salt to make it. It is also not chemical free and requires maintenance. You still need to use chems to balance PH, Acidity level, Algae, etc. This system is generally "softer" on the skin than regular chlorine but make no mistake about it, your pool is making chlorine using salt.