In this section we'll cover the basics and help you set up an AdWords account. Pay attention, since you have to learn to walk before you can run.
Let's imagine you're selling digital cameras. This is a very competitive market. First, start out with market research for the product. You'll need to know a few things before you start:
Top keywords that drive traffic to your product (digital camera, model names, etc)
Google shows 30,400,000 searches per month for "digital camera." As you can see, this word is very competitive. Come up with a few more keywords to target. Please note that your lists should be at least several hundred in size, targeting broad and exact terms. So this is a rather bad example to help you get started with Google AdWords:
nikon digital camera
canon digital camera
small digital camera
cheap digital camera
digital camera deals
buy digital cameras
Having found the keywords, we need to estimate prices for those keywords. To estimate keyword pricing use Google's Traffic Estimator Tool. Take your main keywords and put them into the tool (its OK to put them all in at once). Google will give approximate prices for the keywords in the first three spots (select a country that you want to target).
Google gave $1.37 - $1.93 as the average pricing for the keywords, which is pretty good.
Google Optimization 
