If you've decided that a dedicated server is the best choice for your website - you can set it up however you want and you aren't sharing it with anyone else - the next question you need to answer is whether you're going to rent it or buy it.

Dedicated hosting means you're renting a server from a web hosting company. Your other choice is to buy your own server and pay the host to house it on their premises and connect it to the internet. This is what is known as colocated hosting.