How to Do Search Engine Optimization Tests
Search Engine Optimization is a topic with many unknown variables. Google doesn’t disclose how their search engine works and many try to solve the mystery. For that reason alone there are a lot of hypotheses that are often unproved. The way to test those ideas is to perform a chain of experiments like Commission Blueprint did with their PR to content correlation experiment. They have tested lots of sites over a period of a year. This kind of test is statistically significant and proves the speculation. In this example, by the way, the link of PR and content was proved to be non-existent.