What Is Retargeting? Why the Products You Search on Amazon Follow You Everywhere Online

By James O’Hara

James O’Hara is a senior at the University of Illinois Gies College of Business majoring in Marketing with an interest in brand management and development.

Retargeting: How To Turn Searches into Sales

If you’re anything like me, you’ve probably searched for a product on Amazon, only to see ads for that exact item pop up on completely different websites later?

 Is it a coincidence?  Not at all.

That experience is the result of a marketing strategy known as retargeting.

Retargeting has become one of the most powerful tools used in digital marketing today. Companies can use it to connect with potential customers who have already shown interest in a product or service but haven’t made that purchase yet.

Whether you’re a college student, recent graduate, aspiring entrepreneur, or entering any field involving sales, understanding how retargeting works is essential in today’s digital world.

It reveals not only how companies increase sales, but also how modern marketing relies on data, consumer behavior, and personalization.

When it comes to retargeting, there are three key things to understand: what it is, why it works, and the seven main strategies used in digital marketing today.

Read: Social Media Marketing Fundamentals Every Marketing Manager Should Know

What Is Retargeting?

Retargeting is a digital marketing strategy that allows companies to show advertisements to people who have previously interacted with their brand online.

This interaction could be as simple as:

• Visiting a website
• Searching for a product
• Clicking on an advertisement
• Adding something to your cart
• Opening or clicking links in an email
• Interacting with a brand on social media

When anyone performs one or more of these actions, companies collect behavioral data that helps them identify interest in a product or service. Later, ads are shown to that same user across other websites, social media platforms, or search engines.

For example, if you were to search for “running shoes” on Amazon right now, regardless of if you buy them or not, the next time you scroll through Instagram or read an article online, there’s probably a good chance you’ll see an advertisement for running shoes.

That’s retargeting in action.  

Why Retargeting Works

Retargeting works because most customers do not make a purchase the first time they visit a website.

Why is that?   

There are countless reasons, but in most cases, something is holding the customer back, a “roadblock” that prevents them from completing the purchase right away

Some examples of what a roadblock can look like:

• Leaving websites without buying anything
• Comparing products before deciding
• Needing multiple exposures to feel confident in a purchase

Let’s break down each one a little further so you can get a fuller picture of what I mean.

Many visitors leave websites without buying anything: With technology in almost every aspect of our lives, it can be hard for just one device to have our full attention. It should come as no surprise then that many people browse online while doing other activities, such as watching television or scrolling through social media. A customer might add an item to their cart but leave the website before completing the purchase because they become distracted or run out of time. 

Customers often compare products before deciding: When was the last time you bought a product without looking at what the alternatives were? Like you and I, most online shoppers are constantly evaluating their options. The internet makes it easy as it’s ever been to compare prices, read reviews, and look at competing products before committing to a purchase. Even if someone is interested in a product, they may want to take more time to research it before making a decision.

Customers on average only purchase a product after multiple exposures to it: Repeated exposure plays an important role in consumer psychology. When people see a product multiple times, it becomes more familiar and memorable. This concept is often called the mere exposure effect, which suggests that people tend to develop a preference for things they see frequently.

You can think about it in the same way people build relationships. Unless you’re extremely extroverted, most of us don’t form meaningful connections with strangers after meeting them just once. Instead, relationships tend to develop with people we see repeatedly, like classmates, coworkers, or people we run into regularly.  

Over time, the familiarity builds comfort and trust.  

Read: Social Media Goals That Every Business Should Have

The Seven Types of Retargeting

Marketers use several different forms of retargeting depending on how customers interact with their brand. Below are the seven main types of retargeting strategies used by companies today.

1. Search Retargeting

Search retargeting focuses on what users search for in search engines like Google or Bing.

When someone searches for a specific topic, marketers assume that person has interest or intent related to that search. Advertisers then show ads related to those searches across other websites.

Example

Suppose someone searches for:

• “Best hotels in Chicago”
• “Things to do in Galveston”
• “Affordable laptops for students”

Advertisers may then show ads for:

• Hotels
• Travel packages
• Restaurants or attractions
• Electronics retailers

Search retargeting works because it focuses on user intent. If someone is searching for something, they are likely already considering buying it.

For marketers, this data is extremely valuable because it reveals what consumers are actively thinking about.

2. Site Retargeting

Site retargeting is one of the most common forms of retargeting. It occurs when companies track actions that visitors take on their websites.

For example, marketers can see if a visitor:

• Viewed specific product pages
• Spent time reading certain content
• Added items to a cart
• Started checkout but didn’t finish

If a user leaves the site without purchasing anything, ads for those products may appear later on other websites.

Example

Amazon frequently uses this method. If you add an item to your cart but leave without buying it, you may receive:

• Reminder emails
• Ads for the same product
• Ads for similar products

This strategy is extremely effective because it targets people who already demonstrated strong interest in a product.

3. SEO and SEM Retargeting

Another form of retargeting is based on how users arrived at a website.

Two important concepts in digital marketing are:

• SEO (Search Engine Optimization)
• SEM (Search Engine Marketing)

These strategies focus on improving visibility in search results or using paid search advertisements.

When someone clicks on a website through search results or an ad, marketers can analyze:

• Which keywords were used
• Which advertisement was clicked
• Which platform the visitor came from

Using that information, marketers can tailor follow-up advertisements.

Example

A clothing company might notice:

• Visitors from LinkedIn ads are professionals
• Visitors from TikTok ads are younger consumers

Because of this, the company might show:

• Professional clothing ads to LinkedIn users
• Trendy or seasonal fashion ads to TikTok users

This type of retargeting helps businesses create more relevant messaging for different audiences.

Read: 10 Ways to Blow Your Personal Brand

4. Email Retargeting

Email marketing is one of the oldest digital marketing strategies, but it remains extremely effective.

Email retargeting occurs when companies analyze how users interact with their email campaigns.

Marketers can track:

• Whether someone opened the email
• Which links were clicked
• What products were viewed

Based on this information, companies can send more personalized messages.

Example

If a customer opens an airline email about travel deals and clicks on flights to Brazil, the airline might later send:

• Promotions for Brazil flights
• Vacation packages in Brazil
• Travel tips or guides

Email retargeting works because it uses real engagement data. Instead of guessing what customers want, marketers can see exactly what interests them.

5. Contextual Retargeting

Contextual retargeting focuses on the broader context of a user’s browsing behavior.

Instead of only analyzing one website, marketers look at patterns across multiple sites.

For example, if someone frequently searches or reads content about:

• Pregnancy
• Parenting
• Baby products

Advertisers might show ads for:

• Baby clothes
• Parenting books
• Strollers
• Family health services

This type of retargeting uses context clues to predict what a person might need.

While it can be very effective, contextual retargeting also raises concerns about privacy and data tracking.

6. Engagement Retargeting

Another strategy is engagement retargeting, which focuses on how users interact with a brand.

Engagement can include actions such as:

• Filling out surveys
• Commenting on posts
• Following a brand
• Asking questions online
• Subscribing to updates

These interactions provide valuable insight into consumer interests.

Example

If a customer asks questions about travel insurance on a travel website, the company might later show ads for:

• Travel insurance plans
• Vacation packages with insurance included

Engagement retargeting works because it focuses on people who have already actively interacted with the brand, which often means they are closer to making a purchase.

Read: How to Stand Out in a Saturated Social Media Niche

7. Social Media Retargeting

Social media platforms play a huge role in modern marketing.

Social retargeting allows companies to show ads to users based on their interests, behavior, or the content they consume on social platforms.

Marketers can target audiences who:

• Follow similar accounts
• Watch certain types of videos
• Engage with related content

For example, if someone watches travel content on YouTube or follows travel influencers on Instagram, they might see ads for:

• Travel gear
• Airline promotions
• Travel booking websites

Social media platforms provide powerful targeting tools because they collect large amounts of user data. 

Why Retargeting Matters for Marketers

Retargeting is incredibly valuable because it helps companies focus their marketing efforts on people who are already interested.

Instead of showing ads to random audiences, businesses can target individuals who have:

• Already visited their website
• Searched for similar products
• Engaged with their brand

This makes advertising more efficient and increases the chances of converting interest into sales.

For marketers, retargeting offers several advantages:

Higher conversion rates
People who already interacted with a brand are more likely to purchase.

Better return on advertising investment
Companies spend money advertising to users who are already interested.

Improved customer insights
Tracking behavior helps businesses better understand their audience.

The Role of Data in Retargeting

One of the most important aspects of retargeting is data collection.

Modern digital marketing relies heavily on analyzing user behavior to create personalized experiences.

Companies collect data from many sources, including:

• Website visits
• Search activity
• Social media interactions
• Email engagement
• Purchase history

This data allows marketers to create detailed customer profiles and deliver ads that are more relevant to each user.

For students interested in marketing, this highlights an important shift in the industry: marketing is now heavily driven by analytics and technology.

Ethical Concerns and Privacy Issues

While retargeting can be very effective, it also raises important ethical questions.

Some consumers feel uncomfortable when ads seem to “follow” them across the internet.

Concerns about retargeting include:

• Data privacy
• Tracking user behavior without clear consent
• Excessive personalization

Because of these concerns, many governments have introduced regulations around data collection and online tracking.

Examples include:

• GDPR in Europe
• Privacy laws in several U.S. states

For current and future marketers, it is important to balance effective marketing with responsible data practices.

What College Students Can Learn from Retargeting

Understanding retargeting is valuable for students studying:

• Marketing
• Business
• Advertising
• Data analytics
• Entrepreneurship

Retargeting demonstrates how modern marketing combines:

• Technology
• Consumer psychology
• Data analysis

Those who understand these concepts will have an advantage in today’s job market.

Key takeaways include:

• Marketing is increasingly data-driven
• Personalization improves advertising effectiveness
• Consumer behavior plays a major role in strategy
• Digital tools allow marketers to reach highly specific audiences

Summary

Retargeting is more than just a reminder, more than a forget-me-not, it’s a strategic approach that uses consumer data and behavior to reconnect with potential customers and turn browsing into buying.

By understanding the different types of retargeting and the psychology behind why it works, marketers can create more effective and personalized campaigns.

The strategy has many different approaches and angles and each approach brings new types of data to the table to reconnect with consumers and steer them toward completing a purchase.

For those who utilize it, retargeting can provide valuable insight into how modern marketing works. As digital advertising continues to evolve, marketers who understand consumer data and behavior will be better equipped to create effective campaigns.

The next time you see an advertisement for something you recently searched for, you’ll know exactly why it’s there, and how powerful retargeting is in shaping our online experiences.