The AdWords Success Guide explains the practice and benefits of using negative keywords to your advantage, excluding irrelevant searchers from seeing your ad, let alone you paying for an irrelevant click.
If you really want to be able to measure performance and optimise your campaign effectively, there’s a little more to it.
Example
Dennis and Steve run a […]

Google AdWords includes a wonderful, often unused feature for negative keywords. This allows you to filter out the unwanted irrelevant traffic that would still cost you money in clicks, but not gain you anything in sales.
Using the example of a campaign selling hubcaps, if you don’t sell Renault hubcaps, make sure you use “-Renault” in […]