Ever have feeling of wonder or maybe annoyed, jealous, etc at sites that rank high on Google without being optimized and didn't have much backlinks? If you're curious about this then you should know that there are many reasons why it can happen. The first reason is because click-through rate. This is what a part of Google's algorithm looks at. The percentage number of this component is reflecting the number of click that a websites received from total number of people searching for certain keyword that a website got rank on.
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