Amazon – uses recommendations as a targeted marketing tool in both its email campaigns and its web site pages. According to McKinsey, 35% of Amazon’s revenue is generated by its recommendation engine.
YouTube – leverages Google Brain as a tool to provide video recommendations. It provides users with a truly personalised feed and allows more than 70% of the time people spend watching videos is driven by YouTube’s algorithmic recommendations.
Netflix – splits its viewer base into over 2000 different taste groups and uses both explicit (giving a thumbs up to the video) and implicit data (binge watching a series over 2 days) to dictate which recommendations are sent.