An advertiser would benefit from using affinity audience targeting if they want to reach people:

An advertiser would benefit from using affinity audience targeting if they want to reach people:

  • regardless of their particular interests
  • who’ve already visited their website
  • with a very specific interest, for example, avid marathon runners
  • with a particular broad interest, for example, sports fans

The correct Answer is:

  • with a very specific interest, for example, avid marathon runners

Explanation: With custom affinity audiences, advertisers can create audiences that are more tailored to their brands, compared to our broad, TV-like affinity audiences. For example, rather than reaching Sports Fans, a running shoe company may want to reach Avid Marathon Runners instead.

Read more here: https://support.google.com/adwords/answer/2497941?hl=en
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