A Brief Guide Of The Recommender System


Gone are the days when people relied upon their friends, family, or experts to recommend or advise them on what they should read, eat, or watch. But with the advent of the internet, people now rely upon the taste-making algorithms.

Nowadays, people did not even realize that their online search history contributes to the recommender system algorithms. For example, you searched a dress but did not buy it, that dress will appear on your next online search.

The recommender system anticipates the user’s preference based on his search history. With a plethora of content available online, the recommender system helps in segregating and filtering the relevant content. Recommender system not only improves the user’s online experience but also enhances CTRs, conversions, revenue, and other metrics.

How does a Recommender System work?

There are four phases in the recommender system:


The data collection is the first step in the recommender system.  There are two ways of procuring the data i.e explicit and implicit.  A business can collect implicit data from search history, cart events, search log, and pageviews. You can drive explicit data from the user’s rating, review and feedback.

You can use any database for collecting data like a standard SQL database, NoSQL database or any object storage. First determine factors like ease of implementation, data management, management, and portability. A well-managed database streamlines the entire process and concentrates on suggesting recommendation to users.

For filtering similar user engagement data, you can use simple analysis method. For providing an immediate recommendation, you should bellow recommendation system.

The real-time system provides in-the-moment recommendation by analyzing the stream of online activity, as it created.

Batch analysis accumulates enough data periodically to extract relevant information. For instance,  use an email system for sending newsletters.

Near-real-time-analysis collect data of every second and minute and offer recommendation in the same browsing session.

Finally, filter all the relevant data to offer recommendations to the users. You can choose any below algorithms for that;

Content-based algorithms system recommend the product based on consumer’s online likes, reviews, and ratings.

Cluster algorithms recommend the product irrespective of consumer’s online activity.

Collaborative algorithms recommend the content or product based on other user’s online activity.

Ways for implementing the recommending system in a business:

Any business which does not have data storage capacity can use online frameworks like Hadoop, Spark to processed the dataset faster and assuage the dependability on one machine.

At last, use the MapReduce programming model for processing the data sets by running the algorithm in the distributed file system. Hence,  every business should develop its recommendation system by using open source tools.

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