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How Does Difficulty Affect a Search?

According to this Google study (pdf), in 5 ways:

  1. more question queries,
  2. more frequent use of advanced operators,
  3. more time spent on the results page,
  4. longer queries appearing in the middle and not at the end of search sessions, and
  5. a larger proportion of time spent on the results page.

None of these surprise me, but query length isn't something I've given much thought to.

(via RWW on Twitter)

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