Google Testing With CTR
A long long time ago, Ryan McLaughlin came across something interesting in the SERPs. He discovered that Google was testing a page's CTR (Click-Thur Rate) to see whether that pages was worth of ranking higher.
Mr. McLaughlin went on to write a guest blogpost at SERPWoo, but we couldn't publish it, at the time. It was deemed too controversial.
Controversy #2. A single URL can rank multiple times within a keyword's Google search results WITHOUT either being a part of the feature snippet or special data; straight organic: 1 URL having multiple positions.
No one wants to hear that...
Read the rest of the technique: SEO Avalanche Technique - Controversies
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