Google announced that it will start charging higher minimum bids for keywords for those advertisers whose placements prove less relevant to readers. A “Quality Score” will be associated with each ad, determined chiefly by performance, and the resulting minimum bid for a keyword may change over time. This means that different advertisers will have to pay a different amount at the low end of the keyword bid scale. This will allow Google to reap more ad revenue from advertisers it previously shunted aside in an effort to increase the general relevance of its ad panels.
Source Marketing Vox News
