An answering machine is a device that records voice messages from callers when the recipient is unavailable to answer the phone. It typically connects to a landline and uses a tape or digital storage to save messages. Users can listen to these messages later, allowing them to respond at their convenience. These machines were popular before the rise of mobile phones and voicemail services. They often featured a simple interface with buttons for recording, playing back messages, and adjusting settings. While less common today, answering machines played a significant role in communication during the late 20th century, especially in homes and businesses.