Many succulents are drought resistant, which means that if you overwater your succulents you will cause damage to your plant. Overwatering your succulents will cause your succulents' leaves to shrivel and then turn brown as they begin to rot after that the leaves will fall off. One of the most important rules to remember when watering your succulents is that you must always allow the soil to dry in between watering.
This is important if you want to avoid your succulent's leaves and roots rotting. If you are new to gardening or gardening with succulents it is highly recommended to use a moisture meter to avoid making mistakes. The moisture meter will be able to tell you if your soil is still damp or if it is dry. This way there is no risk of you overwatering.