Back to Glossary

Online Recommendation Engine

What Is An Online Recommendation Engine?

An online recommendation engine is a tool that suggests a variety of products and services to users, based on the insights drawn from their internet activity data. Some tools can also determine a user’s change in behavior to recommend a product that is in line with their newly found interest.

Recommendation Engine Examples

Here are some prevalent examples and how they work to influence consumer choices:

  • Netflix: Netflix tool offers up to 1,300 recommendation clusters that suggest movies and TV shows to a user, based on their moving ratings, browsing activity, or machine learning algorithms.
  • AWS: Amazon’s system uses machine learning algorithms to recommend development trends that can help business owners customize buyer experiences.
  • Musicovery: Musicovery tool offers real-time music recommendations based on a user’s playlist and an artist’s or track’s descriptive metadata, such as genre, mood, acoustic descriptor, location, era, or even mood.

Technology Stack For Online Recommendation Engine

Building a system from scratch requires various technologies that enable the tool to function as intended. The tech stack includes:

  • Artificial Intelligence (AI): AI technology helps recommenders make a rapid and near-accurate product or service suggestions to users, based on their visual needs and preferences.
  • Machine Learning: (ML): This algorithm segments customers based on data, preferences, and internet activity to help online recommenders target users with personalized suggestions.
  • Natural Language Processing (NLP): NLP is used in content-based recommendation engines to suggest products and services based on content synopses or Latent Semantic Analysis (LSA).

Types Of Recommendation Systems

There are three prevalent types of systems based on their suggestion techniques, including:

  • Content-based system: uses data insights from a specific user’s online activity and preference to recommend products or services that are in line with that user’s behavior or preferences.
  • Collaborative system: collects data and insights from multiple users to recommend products and services to another user. The information used is usually from customers with bordering tastes, preferences, or situations.
  • Knowledge-based system: information about a product or service, such as benefits or level of trust is fed into the system, which then recommends the same to online users, especially in complex domains where business-ready data is insufficient.

How Does It Work?

A typical eCommerce recommendation system works in four steps:

  • Data collection: Three types of data are collected, including explicit from ratings and reviews, implicit from user online activity, and psychographics.
  • Storage: data is stored in scalable resources that can accommodate the increasing amount of information gathered over time.
  • Analysis: Real-time, near-real-time, and batch analyses are done on data to gain insights.
  • Data filtration: Data is filtered using mathematical formulas to segment them into scripts that can easily be recognized by the engines.

Challenges Of Recommendation Engines

Although a product recommendation engine can be instrumental in enhancing customer experience, this system comes with various challenges as well, including:

  • Data sparsity: Some data sets are poorly formatted, making it challenging to segment critical and less-useful information from big data.
  • Scalability bottlenecks: Users generate data daily. At the same time, new products and services emerge nearly every day, overwhelming these systems.
  • Latent Association: information might be incorporated wrongly, resulting in mismatching or totally missing product labels.

Frequently Asked Questions About Online Recommendation Engine

How to measure recommendation engine's accuracy?

You can use a special metric known as Mean Average Precision at K (mAP@k) to measure the accuracy and performance of various tools. This metric evaluates the recommendation system in question from two perspectives:

  • Relevance of the predicted items;
  • Whether the most relevant predicted items are displayed at the top.

How recommendation engines are used?

A recommendation engine for eCommerce is used to improve product and personalized shopping experiences. 39% of businesses also reportedly use this system for predictive analytics, which helps them enhance operations.

What are the advantages of recommenders?

Recommenders have various advantages, such as:

  • A consistent brand experience delivery;
  • Website traffic generation;
  • Improved sales and average order value.

You May Find It Interesting

Gepard PIM August Product Updates
4 min read
Gepard Updates

Gepard PIM Product Updates August 2025: Smarter Pipelines, AI Shopping Agents & More

Discover Gepard PIM’s August updates: AI shopping agent, smarter pipelines, Amazon category mapping, compliance tools, and faster testing.

Read more
Product Data Syndication

Product Content Syndication: Tools, Services & Strategy for Multichannel Growth

Define product content syndication and aggregation. How retailers and brands can benefit from syndication and distribution of product content.

Read more
Gepard PIM AI Mapping Feature
< 1 min read
Gepard Updates

From Data Chaos to Global Harmony: Meet Gepard’s AI Mapping Agent

Gepard’s AI Mapping Agent does both jobs: Builds taxonomies and data models. Maps them across suppliers, systems, sales channels.

Read more
Product Taxonomy Definition_ Mapping, Creation & Best Practices

Product Taxonomy Definition: Mapping, Creation & Best Practices

Find out what is product taxonomy, learn about its best practices and why it’s important for eCommerce business.

Read more
How Data Validation Transforms eCommerce Businesses

How Data Validation Transforms eCommerce Businesses

Read about the impact of data validation on eCommerce companies. Learn how to validate data to generate revenue and get a deeper understanding of your customers.

Read more
Gepard PIM AI Mapping Feature

Product Data Mapping: Framework, Automation & Best Practices

Discover what is product data mapping and how Gepard helps automate it. Learn frameworks, tools, and AI-powered solutions for eCommerce success.

Read more
How to Cut EU Chemical Regulations Compliance Time by 90%

How to Cut EU Chemical Regulations Compliance Time by 90%

Automate REACH, CLP & SCIP compliance with Gepard ECHA Connector. Cut risk, reduce manual work & ensure EU chemical regulation readiness.

Read more
Gepard PIM Product Updates July
3 min read
Gepard Updates

Gepard PIM Product Updates July 2025: Product URL Scraping and More

Our Gepard PIM summer release emerges from a structured development cycle underpinned by thorough technical reviews and measured iteration.

Read more
NEW EPREL CATEGORIES: HOW BRANDS DEAL WITH IT

The EPREL “Gotchas” we’re Already Seeing (and How Teams are Fixing Them)

Learn how brands adapt to the NEW EPREL categories: smartphones/tablets labels, PIM workflows, QR links, audits, fines.

Read more
Gepard Deepens Partnership with Fucida
2 min read
Gepard Updates

Gepard Deepens Partnership with Fucida

The extension equips Fucida with a single, cloud-native backbone for listing, validating, and enriching thousands of SKUs on every present and future Amazon storefront.

Read more

Let’s Get In Touch

Need to contact us? Just use this form

Gepard Privacy Policy
Success