Auto dialer software automates the process of dialing phone numbers from a contact list, enabling businesses to efficiently manage outbound calling campaigns. It dials numbers automatically and can detect voicemails, busy signals, or unanswered calls, then either leaves a pre-recorded message or transfers the call to an available agent when a live person answers. Auto dialers are commonly used in telemarketing, sales, and customer service environments to increase productivity by reducing idle time between calls and ensuring agents spend more time engaging with prospects or customers rather than manually dialing numbers.