A water softener is a device designed to remove minerals like calcium and magnesium from hard water. These minerals can cause scale buildup in pipes and appliances, leading to reduced efficiency and lifespan. By softening the water, the device helps improve soap lathering and prevents spots on dishes and glassware. The process typically involves a tank filled with resin beads that attract and hold the hard minerals. When the beads become saturated, they are regenerated using a salt solution, allowing them to continue softening the water. This system is commonly used in homes to enhance water quality and protect plumbing systems.