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Netflix says 80 percent of watched content is based on algorithmic recommendations

It's not just about subscribing to Netflix, it's about trusting it too

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Netflix’s recommendation algorithm is one of the most closely guarded secrets in Silicon Valley.

It’s the series of numbers and variables that suggests what viewers should watch next, and behind Facebook’s News Feed algorithm and Google’s Page Rank, it’s probably one of the most important pieces of math you experience everyday that you might also not even be aware of.

Simply put, the Netflix algorithm takes user data and spits out suggestions and recommendations for what to watch next, by analyzing information about viewing habits and viewing preferences.

For Netflix users, the algorithm is often the difference between staying within a particular genre and only consuming certain kinds of television shows and movies, and trying something new while still staying true to personal likes and dislikes.

An image showing the Netflix main page

Recommending what to watch, by knowing what you watch

You’d think it would be difficult for fans of a certain genre to step outside of their comfort zone, but according to Todd Yellin, Netflix’s vice president of product innovation, approximately 80 percent of subscribers trust and follow the recommendations of the algorithm.

“We found the typical Netflix member on average will only look at 40 or 50 titles before deciding what they want to watch, even though there are thousands of titles available,” said Yellin, in an interview with MobileSyrup. “So it’s important we present the right content to the right member at the right time.”

“Our personalization enables us to create more than 250 million tailored experiences”

For Netflix, it’s not just about getting users to try something new. The Netflix algorithm is also the tool that the streaming service uses to convince viewers to consume the company’s vast library of original programming.

“With more than 1,000 hours of just original content coming to this year and over 104 million subscribers around the world, it is important to surface the right content to the right person at the right time,” said Yellin. “Our personalization enables us to create more than 250 million tailored experiences to delight each user every single time they enter the platform.”

Yellin explained that, broadly speaking, the algorithm works by digging deeper “to find the best suiting content for each member.”

He explained that the algorithm doesn’t just classify content based on genre.

An image showing the recommendation pathway that leads viewers to Jessica Jones

“We refer to genres as wrappers because they are a good descriptor of a mobile or TV show, but they aren’t necessarily complete,” explained Yellin.

The algorithm also categorizes content based on “thousands of additional qualifiers,” like mood, aesthetic, and pace.

And if you think that some of Netflix’s rationale for making a suggestion, like “Dangerous Worlds and Complex Consequences” is strangely specific, know that it’s on purpose.

The more specific the qualifiers, the better the recommendations the algorithm can make.

Jessica Jones, Marvel, and Superheroes

Marvel’s Jessica Jones is a superhero show in the vein of film noir detective thrillers.

It stars Krysten Ritter in the eponymous role as a super-powered, quasi-alcoholic suffering from severe post-traumatic stress disorder caused by having a male supervillain take over her mind and control her every action.

Jessica Jones the show and Jessica Jones the character also share a razor sharp wit, adding some much-needed levity to what is ultimately a story about a victim of abuse learning to overcome the memory of her abuser.

Yellin explained that, to Netflix, Jessica Jones is a dark crime drama like Making a Murderer; it has a strong female lead like Orange is the New Black; and it features a sharp sense of humour like Master of None.

If you’ve watched one of those three shows, then you’ve also probably received a recommendation to watch Jessica Jones.

Likewise, viewers of Jessica Jones, have most likely also received recommendations to watch those other three shows.

The same is true for shows like Marvel’s Daredevil and The Defenders.

The recommendation pathways for Marvel's current lineup of Netflix originals

The more that Netflix members consume content, the more refined the algorithm becomes, and the more likely it will be able to provide useful suggestions.

“Personalization is about creating the right connection between a viewer and their content,” said Yellin. “To do that, we have to understand everything there is to know about the content.”

Yellin also said that Netflix’s qualifiers are just one method among many that are used to provide viewing recommendations.

“We also have to know about the viewer,” said Yellin. “For that, we use advanced algorithms to examine the viewing habits of millions of members around the world along with their specific taste preferences and viewing histories.”

Providing the means to get invested — the rest is up to the viewer

In terms of content, Yellin couldn’t speak to how many people tend to continue watching a particular series after receiving a Netflix recommendation.

However, he was able to confirm that roughly one-in-eight Netflix viewers have tried out a superhero show thanks to the algorithm’s suggestion.

That’s what makes the algorithm so interesting — it’s able to provide suggestions for content that Netflix subscribers might otherwise miss simply because they’re stuck in a viewing bubble.

“We factor diversity into the algorithm to prevent an echo chamber.”

Ultimately, the decision to view a certain television program or movie versus another rests in the hands of the viewer.

“We factor diversity into the algorithm to prevent an echo chamber,” said Yellin. “Just because you may watch horror, doesn’t mean you only want to watch horror.”

For Netflix, it’s all about getting their subscribers hooked and letting the content speak for itself.

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