Advertising has been one of the first and still is one of the most effective means of monetizing web properties. But some websites have always done it much better than others.
What is it that makes some websites irresistible to advertise on while some fail miserably? The way to success is probably the most open secret on the internet today.
Its all about pleasing your users - your target audience.
User is KING!
Happy and satisfied users will keep coming back to your site resulting in a sustained and increasing rate of traffic for your site. You need to figure out what is it that makes your users tick. Get your users and the rest will follow.