Well, also some information on what happens when you change the keywords in the search. "toothpaste" and "best toothpaste" return different results; which is i

Well, also some information on what happens when you change the keywords in the search. "toothpaste" and "best toothpaste" return different results; which is interesting. Also, it mentions that, unsurprisingly, there are external companies attempting to reverse engineer the algorithm.