surveys indicate that almost a quarter of users don’t find what they’re looking for in the first set of links returned by a search engine. That’s partly because the precious needles of information we seek are buried under a haystack that grows by some 60 terabytes every day. And it’s why brutal competition in the search industry is certain to continue, especially as search companies usher in a host of advanced technologies, such as natural-language processing and machine learning.Search Beyond Google