The first thing you need to decide is what kind of server needs you have for the web hosting?
If you just have small web page just for fun, your need are probably low. In this case you can consider a free web hosting with ads or a cheap hosting with few options.
But if you have a bigger and more serious web site you might have to give this some thought.
How much traffic do you estimate? With low traffic you could settle for a shared web hosting service but if you have a sit that will have considerably higher traffic you might want to choose a dedicated server. That means that you get your own server and full control of it. you can either own the server it self or just rent it.