By adding managed placements to a Display Network campaign - you can show your ad:

24) By adding managed placements to a Display Network campaign - you can show your ad:

  A)  on webpages where the Smart Pricing feature determines there the ad is likely delivery ROI.
  B)  on specific webpages, online video games, RSS feeds, and mobile sites and apps that you select
  C)  on webpages where a contextual targeting algorithm identified that is a match between your keywords and a publishers content

  D)  on Google owned and operated properties such as Gmail and Google News - that have relevant content for your keywords.