Notification sounds are audio alerts that signal the arrival of new messages, updates, or reminders on devices like smartphones, tablets, and computers. These sounds can vary in tone and volume, allowing users to customize their experience. Common examples include ringtones for calls and chimes for text messages or app notifications. These sounds serve an important purpose by grabbing the user's attention, ensuring they don't miss important information. Many devices allow users to choose from a range of pre-set sounds or even upload their own, making it easy to personalize notifications according to individual preferences or moods.