Spam calls are unsolicited phone calls made by telemarketers or scammers. These calls often aim to sell products, services, or gather personal information. They can be annoying and disruptive, as they frequently interrupt daily activities. Many spam calls use automated systems to dial multiple numbers at once, making it easier for callers to reach potential victims. Some common tactics include pretending to be from a legitimate organization, such as the IRS or a bank, to gain trust. It's important to be cautious and avoid sharing personal information during these calls.