The function of a web host is to provide the necessary technologies and services required for individuals and organizations to make their websites accessible on the internet. Web hosts store website files on servers and manage the connectivity to the web, ensuring that users can access the content online. These services typically include domain registration, storage space, data transfer, security measures, and technical support. A reliable web host is crucial for maintaining website performance and uptime, which directly affects user experience and the overall success of online ventures.