Voice Over IP (VoIP) is a technology that allows people to make phone calls using the internet instead of traditional telephone lines. It converts voice signals into digital data, which can be transmitted over the internet. This method often results in lower costs for long-distance and international calls compared to conventional phone services. VoIP can be used on various devices, including computers, smartphones, and dedicated VoIP phones. Popular applications like Skype and Zoom utilize this technology, enabling users to communicate easily through voice and video calls. VoIP also offers features like voicemail, call forwarding, and conference calling.