Hostinger, one of our web hosting suppliers explains Web Hosting.
Web hosting is an online service that enables you to publish your website or web application on the Internet. When you sign up for a web hosting service, you basically rent some space on a physical server where you can store all the files and data necessary for your website to work properly.
A server is a physical computer that runs without any interruption so that your website is available all the time for anyone who wants to see it. Your web host is responsible for keeping that server up and running, protecting it from malicious attacks, and transferring your content — such as text, images, files, etc. — from the server to your visitors’ browsers.
When you decide to start a new website, you need to find a web hosting provider that will supply you with that server space. Your web host stores all your files, assets, and databases on the server. Whenever someone types your domain name into the address bar of their browser, your host transfers all the files necessary to serve that request.