In an interesting twist, Jason Tabeling tells us what SEMs can learn from Google AdWords tests. Tabeling compiled a list of changes that Google made since the first of this year, and attempts to
provide insight into how each influences AdWords campaigns. He says the tests appear to coincide with some click-through rate fluctuations, but could just as easily be attributed to optimization and
account goals, as well as the variance in testing.
Read the whole story at Search Engine Watch »