It’s faster to search for “keyword tool”, than to type in the address. Especially when I know Google will always display the result that I want in the first position. But the above result shows two similar results. Look closely.

Yes, there are slight differences – one url has .au, for Australia, so when the resulting page displays, the country is preselected. But everything else is the same – surely that would have been enough to trigger the duplicate filter, and only display one result.

Unless you’re Google, of course.