A lot web hosting service providers will only allow you to host a single domain name on a single account. This works fine if you plan on having one website only. But later on when you need to setup additional websites, you will need to purchase a separate web hosting account for each of those additional websites. So for example, if you have 10 websites, you will need to pay for 10 web hosting accounts.
What's Multiple Domain Hosting?
Multiple Domain Hosting allows you to host multiple domain names, or websites, under a single web hosting account. Multiple Domain Hosting will definitely save you money since you can sign up for an account with one company and manage your websites from a central location.
Aside from saving you money, it also allows you to save time. Since all the domains would be hosted on the same hosting account, you can administer each domain simultaneously through the same control panel.
How Do I Take Advantage of Multiple Domain Hosting?
The best way to get the most out of Multiple Domain Hosting is to use an "unlimited" web hosting account. Any web hosting account that has unlimited storage, unlimited data transfer, and unlimited add-on domains will allow you to host your websites without having to worry going over your web hosting account's quotas or limits.