It's hard enough to nail down the most promising keywords to use, but your conversions rely on more than bidding on the right terms. Even with power-house keywords, you will need to serve up solid ad copy to earn that click. The right ad copy is relevant and proven. Relevance isn't too hard to pull off, but testing ad copy-keyword combinations can drain your budget and your time.
Ad History ensures you get relevance and proven ad copy from the start.