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 and greater flexibility for users, as calls can be made from various devices, including computers and smartphones. VoIP services can include features like video calling, voicemail, and conference calling, making them popular for both personal and business use. Many VoIP providers offer subscription plans that can save users money compared to standard phone services.