Shared web hosting

A shared web hosting service is a web hosting service where many websites reside on one web server connected to the Internet.

This is generally the most economical option for hosting, as the overall cost of server maintenance is spread over many customers. By choosing shared hosting, the website will share a physical server with one or different other websites. With shared hosting, a server will store different other files and would be responsible for serving up the information about them.

See https://en.wikipedia.org/wiki/Shared_web_hosting_service