In general, a domain name identifies a network domain, or an Internet Protocol (IP) resource, such as a personal computer used to access the Internet, or a server computer. Domain names are often used to identify services provided through the Internet, such as websites and email services.

For Example:-

www.domainname.com

When a hosting provider allocates space on a web server for a website to stories its files, they are hosting a website. Web hosting makes the files that comprise a website (code, images, etc.) available for viewing online. Every website you've ever visited is hosted on a server.