The toggle switch UI element acts as an on-and-off switch. A UI/UX designer should add a toggle switch to the product design when they want a simple answer, usually yes/no, show/hide, or on/off. Their main advantage is that they simplify otherwise time-consuming user processes, like navigating and opening different pages.
The toggle switch component is also very intuitive, and it should generally be adopted to manipulate the state of a single feature. Toggles are useful for situations where our users would express certain preferences. For example, we could add an on/off toggle to the Reminders entry, letting visitors choose whether to receive reminders.