An ISP, or Internet Service Provider, is a company that provides individuals and organizations with access to the internet. They offer various types of internet connections such as dial-up, broadband, or wireless, allowing users to connect to the internet from their devices. ISPs also typically provide additional services such as email accounts, web hosting, and virtual private networks (VPNs). By offering internet access, ISPs enable users to browse websites, send and receive emails, stream videos, download files, and perform other online activities.