What is retargeting? How it works, types, costs and how to launch a campaign

Most people who land on your website leave without buying. They get distracted, compare options, or simply aren’t ready yet. Left alone, almost all of them never come back, and the marketing spend that brought them in is wasted. Retargeting is how you win a second chance: it shows ads to people who already visited your site, so your brand stays in front of them until they’re ready to act. This guide covers what retargeting is, how it works, the main types, what it costs, and how to launch your first campaign in Singapore.

What is retargeting?

Retargeting is a paid advertising method that shows ads to people who have already visited your website, used your app, or engaged with your brand but didn’t convert. A tracking code notes who they are, and your ads then follow them to other sites and apps to bring them back. Because these people already know you, they tend to convert more often than cold audiences.

In a small, high-cost market like Singapore, that warm-audience focus matters. Paid clicks here are expensive, so spending your budget on people who have already shown interest is usually more efficient than chasing strangers.

You’ll often see retargeting and remarketing used to mean the same thing. There is a distinction, which we’ll cover below, but many platforms blur it, so don’t get too hung up on the label.

How retargeting works

Retargeting runs on a small piece of tracking code. You place a pixel or tag on your website, and when someone visits, it drops an anonymous identifier (historically a browser cookie) that marks them as a past visitor.

After they leave, that identifier lets ad platforms recognise them on other sites, in apps, or in social feeds. Your ad appears, reminds them of what they looked at, and links them back to your site. None of this needs their name or personal details to work at a basic level. It simply flags that a device showed interest.

The mechanics are shifting, though. Browsers like Safari and Firefox already block cross-site tracking cookies, and users increasingly reject them. So retargeting is moving towards first-party data, meaning information you collect directly with consent, rather than third-party cookies you borrow from the wider web.

A retargeting example, step by step

Say a shopper visits your online store from her laptop and views a pair of shoes. She likes them but leaves without buying.

A few days later, while scrolling on her phone, she sees an ad showing those exact shoes, maybe with a small discount. The ad feels relevant rather than random. She remembers your brand, taps the ad, and completes the purchase.

That round trip, from a lost visit to a recovered sale, is retargeting doing its job.

Retargeting vs remarketing: what’s the difference?

The common distinction comes down to the channel. Retargeting usually means paid ads shown to past website visitors across display, social, and search. Remarketing usually means re-engaging existing contacts by email, such as a cart-abandonment reminder.

In practice, the terms overlap. Google labels its own website-visitor ad product “remarketing”, while other platforms call the same thing retargeting. The table below sums up the general split, but treat it as a guide, not a rule.

	Retargeting	Remarketing
Main channel	Paid ads (display, social, search)	Email
Audience	Past website or app visitors	Existing contacts and customers
Trigger	A pixel or tag on your site	Someone already on your list
Typical use	Bring back visitors who didn’t convert	Re-engage or upsell known contacts

Types of retargeting

Retargeting isn’t one single tactic. It spans several formats and channels, and most campaigns combine a few. Here are the main types you can use.

Pixel-based (site) retargeting

This is the most common form. A pixel on your site tracks visitors and lets you serve them ads afterwards, based on the pages they saw. It works automatically once the pixel is live, so it’s usually the first type marketers set up.

Static vs dynamic creative

Within pixel-based retargeting, your ad creative can be static or dynamic. Static means the same ad for everyone in the audience. Dynamic means the ad populates automatically with the exact products someone viewed, so a shopper who looked at a specific bag sees that bag rather than a generic banner.

List-based retargeting

Here you upload your own contact list, such as email addresses, and the ad platform matches those people to their accounts. It’s useful when you already hold customer data and want to reach known contacts rather than anonymous visitors.

Search retargeting

Search retargeting reaches people based on what they searched for, even if they haven’t visited your site yet. It sits slightly outside pure retargeting, but it targets intent in a similar way.

Social retargeting

This re-engages your visitors inside social feeds like Facebook, Instagram, LinkedIn, or TikTok. The same warm audience sees your ads natively as they scroll, which often feels less intrusive than a display banner, and it sits naturally alongside your organic social media marketing.

Email retargeting

Email retargeting triggers ads or follow-up messages off email behaviour, such as opens or clicks. It links your email activity to your paid campaigns so the two reinforce each other.

Video and YouTube retargeting

If you run video content, you can retarget people who watched it, sometimes by how much they watched. Someone who viewed most of your explainer video is a warmer prospect than someone who skipped after a second.

Platform-by-platform: where to run retargeting

Each major ad platform has its own tracking tag and audience tools. The core idea is the same everywhere: install the tag, build an audience from your visitors, then target that audience. Here’s how the main platforms handle it.

Google Ads (display and search remarketing)

Google calls this remarketing. You add the Google tag to your site, then build audiences in Audience Manager and show ads across the Google Display Network as people browse other sites. Google’s own guidance notes a minimum audience size of 100 active users in the last 30 days for Display campaigns, while search remarketing (RLSA) needs 1,000.

Meta (Facebook and Instagram)

On Meta, you install the Meta Pixel and build website Custom Audiences from your website visitors. Because browser restrictions shrink pixel-only audiences, Meta recommends pairing the pixel with its server-side Conversions API so events still reach the platform.

LinkedIn (Matched Audiences)

For B2B, LinkedIn is often the better fit. You add the LinkedIn Insight Tag to your site, then create a Website Retargeting audience under Matched Audiences. LinkedIn needs at least 300 matched members before an audience can go live, so it suits businesses with steady traffic rather than a trickle.

TikTok

If your audience skews younger or consumer-facing, TikTok may be worth testing. You install the TikTok Pixel, then create a Website Traffic Custom Audience in Ads Manager. TikTok needs a minimum of 1,000 users in a segment before you can target it.

How to set up a retargeting campaign (step by step)

Setting up a campaign follows the same shape on every platform. Below is the sequence, with each step broken out so you can work through it in order.

Install your tracking pixel or tag

Start by placing the platform’s pixel or tag on every page of your site, usually in the site header. Nothing can be tracked until this is live, so verify it fires correctly before moving on.

Define and segment your audiences

Group visitors by what they did. You might build separate audiences for cart abandoners, pricing-page viewers, past purchasers, and recent visitors. Tighter segments let you match the ad to the intent, which usually lifts results.

Set the campaign goal and budget

Choose what you want the campaign to achieve, such as sales or leads, and set a budget that reflects your audience size. Small warm audiences don’t need large budgets to stay visible.

Build the ad creative (static and dynamic)

Create the ads themselves. Dynamic creative that shows the exact products someone viewed tends to work well for ecommerce, while a clear static offer can suit simpler campaigns. Strong ad copy matters as much as the visuals.

Set frequency caps and a burn window

Cap how often each person sees your ad so you don’t wear out your welcome. Just as important, exclude people who already converted, sometimes called a burn window, so you stop paying to advertise to customers who have already bought.

Launch, measure and optimise

Once live, watch how the campaign performs. Track both click-through and view-through conversions, keep an eye on return on ad spend, test different creative, and refresh your ads before they go stale.

How much does retargeting cost?

There’s no single price for retargeting. Cost depends on your platform, audience, and how competitive your market is. Singapore tends to sit at the higher end, with clicks in competitive verticals running several dollars each, so efficient targeting counts. Most campaigns use one of three pricing models.

CPM (cost per mille)

CPM charges per 1,000 ad impressions. It suits awareness-led campaigns, but you pay whether or not anyone clicks, so an ad below the fold can cost you for a view nobody really saw.

CPC (cost per click)

CPC charges only when someone clicks. It fits performance campaigns where you care about measurable actions like purchases or sign-ups, since you pay for engagement rather than exposure.

CPA (cost per action)

CPA charges based on a defined action, such as a purchase or sign-up. It ties your spend most closely to results, though platforms often need enough conversion data before they’ll offer it.

Benefits of retargeting

Retargeting earns its place because it focuses budget on people who already know you. That warm-audience focus drives a few clear benefits.

Higher conversion rates

People who have already browsed your products are closer to buying than first-time visitors. A well-timed reminder often gives them the nudge they need, so retargeted audiences tend to convert at higher rates.

Stronger brand recall

Most people don’t buy on the first visit. Seeing your ads again as they browse elsewhere keeps your brand fresh in their mind, so you’re the name they remember when they’re ready to decide.

Better ROI than cold prospecting

Reaching a warm audience usually costs less than winning brand-new customers from scratch. Combined with higher conversion rates, that can make retargeting one of the more cost-efficient tactics in your mix.

Personalised, cross-device journeys

Retargeting lets you tailor ads to what each person actually did, and follow them from phone to laptop to tablet. That continuity makes your marketing feel more relevant and less like a generic broadcast.

When should you use retargeting?

Retargeting works best when you already have traffic to re-engage, which is why it pairs so well with the organic visitors your SEO services bring in. These are the situations where it tends to pay off most.

Recovering abandoned carts

Shoppers who added items and then left are among your warmest prospects. Ads showing the exact products they left behind, sometimes with a small incentive, can bring them back to finish checkout. This pairs well with your ecommerce SEO work, which drives the traffic in the first place.

Promoting bestsellers

Your top sellers are popular for a reason. Putting them in front of visitors who browsed but didn’t buy gives hesitant shoppers a form of social proof, showing them what others already choose.

Launching new products or collections

Existing visitors already trust your brand, which makes them strong candidates for new launches. Retargeting lets you show fresh arrivals to people who are most likely to care.

Moving slow inventory

Rather than let slow stock sit, you can retarget people who viewed similar items and give those products another push. It’s cheaper than broad advertising and more focused than hoping new visitors stumble across them.

Nurturing B2B leads

B2B buyers rarely convert on one visit. Retargeting keeps your brand in front of them through a longer decision cycle, which fits neatly alongside broader lead generation work.

Common retargeting mistakes to avoid

Retargeting is easy to start and easy to get wrong. These are the mistakes that most often drag results down.

No frequency cap

Without a cap, the same person sees your ad far too often and starts to tune it out or resent it. Set a sensible limit so you stay visible without becoming annoying.

Not excluding people who already converted

If you don’t exclude buyers, you keep paying to advertise to people who have already purchased. Always build an exclusion list so your budget goes to prospects, not existing customers.

Segments too broad or too narrow

One giant “all visitors” audience makes your ads generic, while slicing segments too thin leaves them too small to run. Aim for groups that are specific enough to be relevant but large enough to deliver.

Stale or generic creative

Warm audiences have already seen your first ad, so running the same creative for months leads to fatigue. Rotate your offers and messaging to keep the campaign fresh.

Ignoring landing-page relevance

If your ad promotes a product but sends people to your homepage, you lose the momentum. Match the landing page to the ad so the visit carries straight on, which is where conversion rate optimisation earns its keep.

Retargeting, privacy and the erosion of third-party cookies

Retargeting depends on tracking, so privacy sits at its core. Regulators and browsers have pushed the industry towards more consent and less silent tracking, and that direction is only firming up.

For years the expectation was that Google would remove third-party cookies from Chrome. That didn’t happen. In April 2025 Google confirmed it would keep third-party cookies in Chrome and wouldn’t add a user-choice prompt. So cookies aren’t disappearing overnight.

But they are eroding. Safari and Firefox already block cross-site tracking cookies, and many users reject or delete them. So the reliable signals increasingly come from first-party data: information you collect directly, with consent. Tools like Google’s Consent Mode and server-side tracking help you keep measuring while honouring opt-outs.

In Singapore, the Personal Data Protection Act (PDPA) applies whenever a cookie or pixel collects data that identifies someone. Singapore’s Personal Data Protection Commission expects you to notify users and obtain consent before setting cookies that collect personal data for advertising. There’s no EU-style blanket banner rule, but if your tracking identifies individuals, consent applies, and ignoring a user’s browser settings doesn’t count as agreement.

Is retargeting still effective in 2026?

Yes, but with caveats. Warm audiences still convert better than cold ones, which is the core reason retargeting works. What’s changed is that effectiveness now depends more on consent, first-party data, and sensible frequency than on blanket cookie tracking.

It also depends on how you use it. A well-known study by Lambrecht and Tucker in the Journal of Marketing Research found that dynamic retargeted ads, showing the exact product someone viewed, were on average less effective than generic brand ads. The exception was telling: once a shopper’s browsing suggested their preferences had firmed up, such as visiting review sites, the dynamic ads stopped underperforming.

The practical takeaway is that timing and relevance matter more than simply following people around. Retargeting late in the decision process, with creative that matches where the buyer actually is, is where it earns its keep.

Frequently Asked Questions

Get help with retargeting in Singapore

Retargeting turns lost visits into recovered sales, but it takes the right tracking, segments, and creative to do it well. If you’d like a hand setting it up, our team can help you plan and run campaigns that work alongside your wider marketing. Eligible businesses may also be able to tap the PSG grant for digital marketing to offset the cost. If this guide helped, share it with someone who could use a second chance at those lost visitors.