An Internet Service Provider (ISP) is a company that offers individuals and businesses access to the Internet. ISPs connect users to the web through various technologies, such as fiber optics, cable, or DSL. They provide the necessary infrastructure and services to enable browsing, streaming, and online communication. In addition to basic Internet access, ISPs often offer additional services like email accounts, web hosting, and technical support. Choosing the right ISP can depend on factors like speed, reliability, and customer service, making it important for users to research their options to find the best fit for their needs.