How to Create a Website - Create-Website.org
When a website is created using a website creation application that is provided by a web hosting company, the resulting website content is physically stored only on the server computer.
This approach implies that if you decide to switch web hosting companies, it is often difficult to take your website and content with you.
If, however, you construct your website using a website builder installed on your computer, the web content is initially created and resides on your hard drive. You are able to navigate through the website as if it were on the Internet, however it is only visible to you.
Before it can be viewed by the world, the website content must be published (i.e. copied) to the server computer. The development software, website and data content, however, remains on your computer.