How Netflix Uses Analytics To Select Movies, Create Content, And Know What You Want To Watch Next.

In 2006 Netflix announced the Netflix Prize, a competition for creating an algorithm that would “substantially improve the accuracy of predictions about how much someone is going to enjoy a movie based on their movie preferences.” There was a winner, which improved the algorithm by 10%. However, Netflix never did implement the algorithm, saying:

“We evaluated some of the new methods offline but the additional accuracy gains that we measured did not seem to justify the engineering effort needed to bring them into a production environment.”

But Netflix didn’t shun all algorithm and data efforts.

To the uninitiated, it may seem that Netflix’s analytics go only as far as views. They may also think that the show House of Cards was chosen because Netflix “thought subscribers might like it.” But the truth is much, much deeper. The $100 million show wasn’t green-lighted solely because it seemed like a good plot. The decision was based on a number of factors and seemingly almost entirely on data.

The reality is that Netflix is a data-driven company. Saying that Netflix chooses new content based on “whoever they can get a license with” is a very thin and vague statement. Netflix does need licenses from studios, but they don’t just pick movies and television shows at random.

Read on to learn more about the future of television programming and how analytics is helping Netflix become a better business and service.

Analytics at Netflix

The core job of analytics is to help companies gain insight into their customers. Then, the companies can optimize their marketing and deliver a better product. (Without analytics, companies are in the dark about their customers.) Analytics gives businesses the quantitative data they need to make better, more informed decisions and improve their services.

So how does Netflix use analytics?

“There are 33 million different versions of Netflix.”

– Joris Evers, Director of Global Communications

As of July 2018, Netflix has 130 million worldwide streaming subscribers. Having this large user base allows Netflix to gather a tremendous amount of data. With this data, Netflix can make better decisions and ultimately make users happier with their service.

Traditional television networks don’t have these kinds of privileges in their broadcasting. Ratings are just approximations, green-lighting a pilot is based on tradition and intuition. Netflix has the advantage, because being an internet company allows Netflix to know their customers well, not just have a “persona” or “idea” of what their average customer is like. Let’s look at an example.

If you’re watching a series like Arrested Development, Netflix is able to see (on a large scale) the “completion rate” (for lack of a better term) of users. For example, the people at Netflix could ask themselves “How many users who started Arrested Development (from season 1) finished it to the end of season 3?” Then they get an answer. Let’s say it’s 70%.

Then they ask “Where was the common cut off point for users? What did the other 30% of users do? How big of a ‘time gap’ was there between when consumers watched one episode and when they watched the next? We need to get a good idea of the overall engagement of this show.”

They then gather this data and see user trends to understand engagement at a deep level. If Netflix saw that 70% of users watched all seasons available of a cancelled show, that may provoke some interest in restarting Arrested Development. They know there’s a good chance users will watch the new season.

But the data gets deeper than that. Here’s a look at some of the “events” Netflix tracks:

  • When you pause, rewind, or fast forward
  • What day you watch content (Netflix has found people watch TV shows during the week and movies during the weekend.)
  • The date you watch
  • What time you watch content
  • Where you watch (zip code)
  • What device you use to watch (Do you like to use your tablet for TV shows and your Roku for movies? Do people access the Just for Kids feature more on their iPads, etc.?)
  • When you pause and leave content (and if you ever come back)
  • The ratings given (about 4 million per day)
  • Searches (about 3 million per day)
  • Browsing and scrolling behavior
  • Netflix also looks at data within movies. They take various “screen shots” to look at “in the moment” characteristics. Netflix has confirmed they know when the credits start rolling; but there’s far more to it than just that. Some have figured these characteristics may be the volume, colors, and scenery that help Netflix find out what users like.

Why does Netflix want to know when the credits roll? They probably want to see what users do afterward. Do they leave the app or go back to browsing? Notice how Netflix now offers movie recommendations (they have personalization algorithms that aim to accurately predict what users will watch next) soon after credits start (or, for television shows, they automatically play the next episode).

Because if users leave the app after watching a show, that may mean they are more likely to cancel. Allow me to explain:

Through their analytics, Netflix may know how much content users need to watch in order to be less likely to cancel. For instance, maybe they know “If we can get each user to watch at least 15 hours of content each month, they are 75% less likely to cancel. If they drop below 5 hours, there is a 95% chance they will cancel.”

So now that they have this data, they can ask themselves “How do we help users watch at least 15 hours of content per month?” One idea: enable post-play, which automatically plays the next episode of a TV show unless the user opts out. For movies, show movie suggestions (based on the rating of the movie just watched) right after the credits start rolling and allow users to press play right from that screen. Netflix can add this feature to their web and mobile apps and, again, through analytics, see the results.

This is only a theory of how Netflix came to the decision to implement post-play and an example of how analytics can help Netflix make decisions. I don’t have any inside information.

So all of this data and the large user base allow Netflix to quickly see trends and formulate opinions. Later, we’ll get into the factors that made them green-light House of Cards.

The Recommendation Algorithm

As part of the on-boarding process, Netflix asks new users to rate their interest in movie genres and rate any movies they’ve already seen. Why do they do this right up front? Because helping users discover new movies and TV shows they’ll enjoy is integral to Netflix’s success.

If people run out of movies they want to watch and have no way to find new movies, they’ll cancel. It’s important that Netflix puts a lot of focus on making sure they have an accurate algorithm for this rather than having users rely on outside sources to find new movies.

Is the recommendation algorithm accurate and successful?

Since 75% of viewer activity is based on these suggestions, I’d say it works pretty well for them.

But now that more users are moving to streaming, what they actually watch is more important than ratings. When it was DVD-by-mail, Netflix users had to wait, and the rating was a “thought process.” Netflix engineers Xavier Amatriain and Carlos Gomez-Uribe explain:

Amatriain:

“When we were a DVD-by-mail company and people gave us a rating, they were expressing a thought process. You added something to your queue because you wanted to watch it a few days later; there was a cost in your decision and a delayed reward. With instant streaming, you start playing something, you don’t like it, you just switch. Users don’t really perceive the benefit of giving explicit feedback, so they invest less effort.”

Gomez-Uribe:

“Testing has shown that the predicted ratings aren’t actually super-useful, while what you’re actually playing is. We’re going from focusing exclusively on ratings and rating predictions to depending on a more complex ecosystem of algorithms.”

As we can see, the algorithm is evolving. There are entire teams (Netflix has over 800 developers in total) working on it. It’s not static because user behavior and the Netflix product are changing.

The New Thumbs Up/Down Rating System

In April 2017, Netflix debuted a new rating system. Previously, users would rate movies and TV shows on 1-5 stars. But after their product teams ran some tests, they found a new, simpler “thumbs up-thumbs down” test beat the original star-based rating system. In their Q1 2017 Letter to Shareholders, Netflix wrote:

As always, our product team has dozens of tests running in the endless quest for even higher member satisfaction. One test that won conclusively last year and has now been rolled out to all members is our new “thumbs-up thumbs-down” feedback model, replacing the 5-star model we have had from our DVD days. The amount of usage we get with this new approach is over twice as many ratings. With this additional personal input, we’ll be able to improve personalization, making your front screen on Netflix even more relevant.

How Big Data Factored into House of Cards

In 2011 Netflix made one of the biggest decisions they’ll ever make. It wasn’t anything material, but rather it was about content. They outbid top television channels like HBO and AMC to earn the rights for a U.S. version of House of Cards, giving them 2 seasons with 13 episodes in each season.

At a cost of $4 million to $6 million an episode, this 2-season price tag is over $100 million. Netflix has undoubtedly made other big money investments before (shipping centers, postage costs, etc.), but nothing like this on the content side. So why did they make such a big bet, and how did analytics factor into the decision? Let’s get into it.

Pre-Green-light

Before green-lighting House of Cards, Netflix knew:

  • A lot of users watched the David Fincher directed movie The Social Network from beginning to end.
  • The British version of “House of Cards” has been well watched.
  • Those who watched the British version “House of Cards” also watched Kevin Spacey films and/or films directed by David Fincher.

Each of these 3 synergistic factors had to contain a certain volume of users. Otherwise, House of Cards might belong to a different network right now. Netflix had a lot of users in all 3 factors.

This combination of factors had a lot of weight in Netflix’s decision to make the $100 million investment in creating a U.S. version of House of Cards. Jonathan Friedland, Chief Communications Officer, says “Because we have a direct relationship with consumers, we know what people like to watch and that helps us understand how big the interest is going to be for a given show. It gave us some confidence that we could find an audience for a show like House of Cards.”

In an interview with Gigaom, Steve Swasey, VP of Corporate Communications, expands:

“We have a high degree of confidence in [House of Cards] based on the director, the producer and the stars…. We don’t have to spend millions to get people to tune into this. Through our algorithms, we can determine who might be interested in Kevin Spacey or political drama and say to them ‘You might want to watch this.’”

Swasey says it’s not just the cast and director that predict whether the show will be a success. “We can look at consumer data and see what the appeal is for the director, for the stars, and for similar dramas,” he says. Add this to the fact that the British version of House of Cards has been a popular DVD pick for subscribers. Combining these factors (and the popularity of political thrillers) makes it seem like an easy decision for Netflix to make. The only question was how much they were willing to invest. We’ll get into the early ROI numbers a little later.

After the Green Light

Now that Netflix has made the $100 million investment, they are in part responsible for promoting it. And with the data they have, they can make a “personalized trailer” for each type of Netflix member, not a “one size fits all” trailer. Let me explain…

Before a movie is released or TV show premiers, there’s typically one or a few trailers made and a few previews selected. Netflix made 10 different cuts of the trailer for House of Cards, each geared toward different audiences. The trailer you saw was based on your previous viewing behavior. If you watched a lot of Kevin Spacey films, you saw a trailer featuring him. Those who watched a lot of movies starring females saw a trailer featuring the women in the show. And David Fincher fans saw a trailer featuring his touch.

So now that the first season has run, let’s look at some of the early metrics. These won’t determine immediately whether the House of Cards investment can be considered successful, but rather the trajectory that it’s on.

What do you think the average success rate is for new TV shows? In other words, if a television network green lights a new TV show, what are the chances it will be profitable or won’t be cancelled after a couple of seasons?

Your guess?

The answer is 35%, on average.

When a network green lights a show, there’s a 35% chance it succeeds and a 65% chance it gets cancelled. At the time of this writing, Netflix has 7 TV shows, of which 5 have been renewed for another season. If this rate can continue for years, the Netflix success rate will be about 70%.

So why does Netflix renew shows at a higher rate than conventional television networks? Does the data make the difference? Is the success rate legitimate or can you not compare an Internet television network to conventional TV networks?

Has House of Cards been a success? It has brought in 2 million new U.S. subscribers in the first quarter of 2013, which was a 7% increase over the previous quarter. It also brought in 1 million new subscribers from elsewhere in the world. According to The Atlantic Wire, these 3 million subscribers almost paid Netflix back for the cost of House of Cards.

And what about current subscribers? Does having House of Cards make them less likely to cancel their subscription?

Yes, for 86% of them.

A survey showed that 86% of subscribers are less likely to cancel because of House of Cards but only if Netflix stays at the $7.99 price point. While this may seem impressive, you should take this survey with a grain of salt. As the author points out:

“The sample size is small. Only 346 of the 1,229 U.S. consumers surveyed on February 12-13, 2013 are Netflix customers, although another 223 are classified as non-subscribers who have access to a Netflix subscription. About 10% of subscribers and those with access to Netflix viewed at least one episode of House Of Cards in the first 12 days after it became available. The average person who tuned in watched six episodes over that period, but 19.4% watched all 13.”

What can be safe to say is that House of Cards gives all Netflix subscribers one less reason to cancel. How big or how small the reason is arbitrary.

Orange is the New Black

Weeds was a pretty popular show on Showtime. It also has been streaming on Netflix for quite some time and has been one of their most viewed shows, according to their “Popular on Netflix” section. So when creator Jenji Kohan had the idea for a new TV show, Netflix knew they had to jump in. To be able to get a series with the popularity and quality of Weeds would be a big hit, especially in a lineup next to House of Cards. Early metrics show that Orange is the New Black is getting off to a more successful start than Arrested Development and even House of Cards.

Blog by Julez for Styles Rebel Radio

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