The acronym ISP stands for Internet Service Provider in digital communication. ISPs provide users with access to the Internet, offering various connectivity options such as dial-up, DSL, cable, fiber optics, and wireless. They play a crucial role in maintaining the Internet infrastructure, providing services that allow individuals and businesses to communicate, share information, and access online resources. ISPs may also offer additional services, including web hosting, email accounts, and security options, contributing to overall digital connectivity.