Domain vs hosting

A domain is the address people type, like yourbusiness.com. Hosting is the machine that stores your site and serves it to whoever asks for it. You need both to put something online: the domain is what people remember, the hosting is what actually answers. They come from different providers, they are bought separately, and one small set of DNS records is what connects them.

The difference in one line each

• The domain is the address. A unique name registered to you, that nobody else on the internet can hold at the same time. It does not store anything. Its whole job is to point at something.
• The hosting is the destination. Somewhere your files actually sit and respond when a browser asks. It has no memorable name of its own until a domain is pointed at it.

The familiar comparison holds up well: the domain is the street address, the hosting is the building. The address is how people find the place. The building is the place. You can hold an address before anything is built on it, and you can put up a building that nobody can find because it has no address yet. Neither is much use alone.

What you actually need to put a site online

Three things, and it is worth seeing them separated:

1. The site itself. The pages, whether you wrote them, designed them, or had an AI tool build them for you.
2. Somewhere to serve them. A host that keeps those files online and answers requests for them.
3. An address people can type. A registered domain pointed at that host.

Most confusion about domains and hosting comes from products that bundle all three and never explain which is which. That bundling feels simpler until you want to change one of them.

How the two connect

The join between them is DNS. Your host tells you what to point at, and you add that as a record on your domain:

• An A record points your domain at a numeric IP address the host gives you.
• A CNAME record points a subdomain, such as www, at a hostname the host owns.
• MX records do the same job for mail, and they point somewhere else entirely: your email provider, which does not have to be your host. See business email on your domain.

The practical rule is to copy the values your host shows you exactly, character for character, rather than composing them from memory. Nearly every connection problem is a typo or a missing record rather than anything deeper. DNS records, explained covers each type in one line, and my domain is not connecting walks the three checks in order when it does not work first time.

Why they are usually separate purchases

A domain and a host do genuinely different work, and the companies that are good at each are rarely the same company. Keeping them apart buys you two concrete things:

• Moving is a records change, not a migration. If you change hosts, you repoint the domain and your address stays exactly the same. Visitors, links and business cards keep working.
• One provider’s problem stays one provider’s problem. Your address is not entangled with whoever is serving your pages this year.

The argument for buying both from one company is a single bill and one login. That is a real convenience and a fair reason to choose it. It is worth knowing what you trade for it, which is mostly the ease of leaving.

Where Just Domain sits

Just Domain does one job: it registers and runs domains. Full DNS record management is included at no extra charge, so pointing your name at any host is part of the product rather than an upgrade. There is no hosting sold here and no bundle to opt out of. Point your name wherever you want it.

If you built something with an AI tool and need somewhere to put it, Just Publish is the publishing layer in the same family: your AI builds the site, Just Publish takes the files and puts them live. It is one option among many, and your domain works the same way with any of them.

Which to get first

Get the domain first. It is the piece that someone else can take before you do, and every name is unique, so the one you want is available exactly until it is not. Where the name points is a decision you can change any number of times afterwards; the name itself is the part that is contested.

Domain availability changes constantly. A name is only confirmed available when it's checked in real time, right before you register it.

I'm building [what you're building] and I'm not sure what I actually need to buy. Explain the difference between the domain and the hosting for my case, tell me which to get first, then check live availability for my name ideas and show me a checkout link for any that are free.