Web hosting allows businesses, organizations, and individuals to make their websites or apps visible on the internet. Whether they're using a dedicated server, or sharing resources, every website is hosted on a server. The only way for a website to be visible on the internet is if it's hosted by a web hosting service provider, also known as a web host. In order to find a website, you type the domain name (or URL) into your browser. Your computer will then connect to the server where the website is hosted, and the webpage is delivered onto your screen.

Migration or transfer services are often free or offered at a reasonable fee. These services help move your existing site to the new hosting provider. They can save a huge amount of hassle. Just remember that the migration process is often automated, and may fit in with the host's processes and needs rather than yours. Not everything may migrate, and you may find the organization of the newly migrated site makes for harder maintenance in the long run.
In result, your personal info, such as  physical address, emails, telephone number, etc is hide from the public. Domain privacy is important because your domain record (ie. the WhoIs data) may also be used in ways that aren’t legitimate or desirable. Since anyone can look up a WhoIs record, spammers, hackers, identity thieves and stalkers may access your personal information!
In housing terms, VPS hosting is like renting your own apartment in a larger building. You're much more isolated than in the roommate situation mentioned above; it's still possible that a neighboring apartment could causes annoyance for you, but far less likely. In web hosting terms, Site A's traffic surge won't have nearly as much impact on Site B or Site C. As you'd expect, VPS hosting costs more than shared hosting. You'll pay roughly $20 to $60 per month.
Many services offer so-called unlimited or unmetered service for whatever amount of bandwidth, disk storage and sites you use. It's important to understand that most terms of service actually do limit the definition of "unlimited" to what's considered reasonable use. The bottom line is simple: if you're building a pretty basic website, unlimited means you don't need to worry. But if you're trying to do something excessive (or illegal, immoral or fattening), the fine print in the terms of service will trigger, and you'll either be asked to spend more or go elsewhere.