Guide

How to Set Up Retargeting Ads for Your Business

Most people who visit your website for the first time don’t take any action. They browse, perhaps spend a few minutes reading, and then leave — often to compare alternatives or simply because they’re not ready to buy yet. Retargeting (also called remarketing) lets you follow up with those visitors by showing them targeted ads as they browse other websites, watch YouTube videos, or scroll through social media.

It’s one of the most cost-effective forms of digital advertising because you’re targeting a warm audience — people who already know your brand and have shown some level of interest. Conversion rates from retargeting campaigns consistently outperform cold audience campaigns. This guide covers how retargeting works and how to set it up on the two most important platforms for small businesses: Google and Meta (Facebook and Instagram).

How Retargeting Works

Retargeting works by placing a small piece of code — a pixel or tag — on your website. When a visitor lands on your site, the pixel places a cookie in their browser. That cookie identifies them when they visit other websites or social platforms that are part of the ad network, triggering your ad to appear. From the visitor’s perspective, your brand seems to follow them around the internet — which is the effect you’re aiming for.

You can segment your retargeting audiences based on what pages they visited. Someone who looked at a specific product page is a stronger prospect than someone who only visited your homepage. Someone who added items to a basket but didn’t complete checkout is your warmest prospect of all. Showing different ads to different audience segments — matched to where they are in the buying journey — produces significantly better results than showing everyone the same ad.

Setting Up Google Remarketing

In Google Ads, go to Tools and Settings, then Audience Manager, then click the plus icon to create a new audience source. Select ‘Google Ads tag’ and follow the instructions to install the global site tag on every page of your website (or use Google Tag Manager if you already have it set up). Once the tag is live and collecting data, create audience lists based on page visits — all visitors, visitors to specific pages, or visitors who completed or abandoned specific actions.

Create a Display Network campaign and select your remarketing audience as the targeting. Write ads that acknowledge the visitor’s existing familiarity with your brand — you don’t need to introduce yourself from scratch. Offer something relevant: a reminder of what they were looking at, a limited-time discount, or a reason to come back. Set a frequency cap to avoid showing the same ad too many times to the same person.

Setting Up Meta Retargeting

Meta retargeting begins with the Meta Pixel, installed on your website via Meta Business Suite. Once installed and collecting data, you can create Custom Audiences in the Ads Manager based on website activity — all visitors, visitors to specific URLs, people who initiated checkout, or people who have viewed your content. These audiences update automatically as new visitors meet the criteria.

Create a retargeting campaign in Meta Ads Manager targeting your Custom Audience. Because these users already know your brand, you can use more specific messaging than you would with a cold audience. Dynamic ads — which automatically show users the specific products or pages they viewed on your site — are particularly effective for e-commerce retargeting. Set a reasonable attribution window and monitor frequency to avoid over-exposure, which can cause ad fatigue and negative brand sentiment.

FAQs

Common questions.

How long should my retargeting window be?
A 30-day window is a good starting point for most businesses — it captures people who have shown recent interest without showing ads to people whose visit is too old to be relevant. For high-consideration purchases (cars, legal services, big-ticket products), a longer 60–90 day window may make sense. For fast-moving consumer goods or time-sensitive offers, a shorter 7–14 day window keeps the audience warm and relevant.
Is retargeting compliant with UK privacy law?
Retargeting relies on cookies, which require explicit consent under UK PECR (Privacy and Electronic Communications Regulations). Your website must have a compliant cookie consent mechanism that gives visitors a genuine choice. Users who decline analytics and marketing cookies should not receive retargeting ads. Ensure your cookie policy and consent tool are up to date.
How much should I budget for retargeting?
Retargeting audiences are typically much smaller than cold audiences, so budgets can be modest. Even £5–£15 per day on Google Display or Meta can deliver meaningful reach to your website visitors. Start with a small budget, review performance after a few weeks, and scale up based on what’s working. Retargeting often delivers a lower cost per conversion than any other campaign type.
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