This is a hosting account on a server that hosts your site and no one else’s.
Dedicated hosting is more expensive to buy and look after, but it means that your site will not suffer from bad neighbours.
There are usually two types of hosting: shared and dedicated. Shared hosting means you will have to share your servers with other sites, which means you could find yourself with bad neighbours. Whilst this option might be cheaper, it does come with drawbacks.
Dedicated hosting means you get the server all to yourself! It is usually more expensive but, in this case, you get what you pay for.