So you have a website but its only displaying your information you created at the moment, which could be on anything and any subject. So you think I need to do more than just my business on this website and then you open up a whole realm of possibilities.
You have to think about a real world shop for example your paper shop that you may go to in the morning will be mainly selling papers but will also probably have adverts in the window. So from this example you can see that although he is doing his main business from selling papers he is also renting out advertising space.
You need to view your website in the same manner either you are selling something yourself you may also want to put other ads that complement your website and bring in extra income from this.
The main thing to decide is how you are going to go about doing this there are two main methods there are providing context based ads from people like Google, Yahoo, and MSN there are general affiliates that you have to look for.
There is already a lot of information about contextual based advertising and I can recommend that if you are website owner that looking at Michael Cheneys videos are...