Most people who visit a small business website leave without calling, booking or buying. Remarketing ads put you back in front of those people after they've gone. Done well, it's one of the cheaper parts of paid advertising for a UK small business. Done badly, it spends money following the wrong people around the internet and can put you on the wrong side of UK privacy law.
This guide explains how remarketing works on Google and Meta, how big your audience needs to be, what it costs, and the consent rules every UK business has to follow.
What are remarketing ads and how do they work?
The technical part is straightforward. You install a tag, either the Google tag or the Meta pixel, and it records visits to your pages. You then build audiences from rules, such as "visited the pricing page but not the thank you page" or "viewed a product in the last 14 days". Each audience is a list you can target or exclude.
The strategy is where the value comes from. If someone visited your boiler servicing page on Tuesday, they probably have a boiler problem this week. An ad on Thursday that mentions same-week appointments is relevant to them. A generic brand ad shown to everyone who ever landed on your homepage is much less useful.
How big does my audience need to be before ads will run?
Google Ads Help states the 100 user minimum for all three networks, a lower bar than Google used to set. This matters most for small local businesses. A florist in a market town or a solicitor with a niche practice area might take a few weeks to reach 100 consenting visitors on any one page.
If your traffic is low, build broad audiences first, such as all visitors or all service pages. Split them into narrower lists only when volume allows.
How long should people stay on a remarketing list?
According to Google's help page on how data segments work, both Display Network and Google Search segments default to 30 days and are capped at 540 days. Google can also close a segment if it hasn't been used in targeting for 540 days. A closed segment stops adding new people until you reopen it.
Here is a practical way to set it:
- Impulse or same-week purchases (takeaways, events, emergency trades): 7 to 14 days.
- Considered local services (dental treatments, home improvements, accountants): 30 to 90 days.
- Big-ticket, slow decisions (kitchens, wedding venues, B2B contracts): several months, with fresh creative so returning visitors aren't shown the same ad for a whole season.
Meta has its own retention settings for website audiences, set in Ads Manager when you create the audience. Check the current limit there rather than relying on a figure from a blog post, because platform limits change.
Do I need cookie consent for remarketing in the UK?
The ICO's guidance on how the storage and access rules apply to online advertising is clear that advertising purposes fall under the consent requirement. Rejecting has to be as easy as accepting. A banner saying "by continuing to browse you agree" doesn't count as consent.
What this means for a small business:
- Use a consent banner that blocks the Google tag and Meta pixel until someone accepts advertising cookies.
- If you use Google tags, set up Consent Mode so the tags respect the visitor's choice.
- Expect your lists to be smaller than your analytics traffic. That's normal, and the people who opt in are the only ones you're allowed to remarket to anyway.
If you're reviewing your wider data practices at the same time, our UK data protection checklist for AI and customer data covers the questions to ask any tool that touches visitor information.
How do I set up remarketing on Google Ads?
A workable sequence for a small business:
- Tag the site. Add the Google tag through your website builder's integration or Google Tag Manager, behind your consent banner.
- Set up conversions. Track the actions that matter, such as form submissions, calls from the site, bookings or purchases. Without these, you can't tell whether remarketing works.
- Build segments. Start with "all visitors, 30 days" and "visited a service or product page, 30 days". Create a "converted, 30 days" list to exclude.
- Choose placements. Display and YouTube remarketing reach people while they browse. Search segments let you bid differently when a past visitor searches again, which is often the most profitable use for service businesses.
- Write specific ads. Mention the page they looked at, a clear next step, and a genuine reason to act now, such as availability this week.
How do I set up remarketing on Facebook and Instagram?
Meta's strength is visual creative in the feed. A before-and-after photo from a landscaper, a short video tour of a holiday let, or a customer review shown as an image will usually do better than a text-heavy banner. Shops can also run catalogue ads that show visitors the exact products they viewed. This works alongside abandoned cart emails for UK online shops, because the email reaches people who gave you their address and the ad reaches people who didn't.
Keep the audience setup simple. One audience of recent site visitors and one exclusion list is enough to start. Splitting a small list into five ad sets spreads the budget too thinly for any of them to learn.
How much do remarketing ads cost?
There is no price list for remarketing, and you should be wary of any article that quotes a "typical" UK cost per click without naming where the figure came from. What you can control:
- Daily budget. Start with an amount you're comfortable treating as a test for a few weeks.
- Frequency. On a small list, the platforms can show the same person your ad many times a day. Set frequency caps where they're available, and refresh creative regularly.
- Exclusions. Excluding recent customers and job applicants (people who visited your careers page) is one of the easiest ways to stop wasting spend.
- Measurement. Judge results on conversions, not clicks. If you run more than one version of an ad, read our guide to A/B testing for UK small businesses before picking a winner from a handful of results.
When is remarketing not worth it?
Remarketing only brings people back to the same page they left. If that page loads slowly, hides the phone number or gives no reason to trust you, the second visit fails for the same reason as the first. Adding social proof often helps more than extra ad spend. Our guide on how to add reviews to your website covers the practical options.
It's also a poor fit for one-off emergency purchases, where the customer has usually bought from someone else by the time your ad appears, and for businesses with long waiting lists that don't need more enquiries.
How do I know if my remarketing is working?
Platform reports can make remarketing look better than it is, because they credit conversions from people who were already likely to come back. A simple check is a holdout: pause the campaign for two weeks and see whether enquiries actually fall. If they don't move, the campaign was mostly taking credit. If they drop, you have evidence it pays for itself.
Look at the search terms and placements reports monthly, keep your conversion tracking clean, and review your consent banner whenever you change your website platform.
Remarketing Ads for UK Small Business — FAQ
How many website visitors do I need before Google remarketing ads will run?
According to Google Ads Help, a data segment needs at least 100 active visitors or users in the last 30 days before it can serve on the Display Network, Search or YouTube. Google applied this lower threshold to segments created or refreshed from 1 February 2024 onwards. If your site gets only a handful of visits a week, the list may take a while to qualify. Use that time to check that your tag works and that your cookie banner records consent properly, so the list starts building with clean data. You can also widen the list by including all visitors rather than only people who reached one specific page, then split it into narrower lists once you have enough volume.
How much do remarketing ads cost a UK small business?
There is no fixed price. Google and Meta both run auctions, and you set a daily budget that the platform manages your spend against over a billing period. What you actually pay per click or per thousand impressions depends on your sector, your location targeting and how many other advertisers want to reach the same people. Remarketing lists are small by design, so these campaigns often spend less than prospecting campaigns because there are fewer people to reach. The honest way to price it is to start with a small daily budget you are comfortable treating as a test, run it for a few weeks, and judge it on enquiries or sales rather than clicks.
How long can someone stay on my remarketing list?
Google Ads Help states that the default membership duration for website segments on both the Display Network and Google Search is 30 days, and the maximum is 540 days. If you set a longer duration, people still drop off at 540 days. Google can also close a segment automatically if it has not been used in targeting for 540 days, although you can reopen it. For most small businesses, the useful window is much shorter than the maximum. Match it to your buying cycle: days for a takeaway or event, weeks for a trade job, and months for something like a kitchen fit or a wedding venue.
Do I need cookie consent to run remarketing ads in the UK?
Yes. The ICO's guidance on storage and access technologies says that using cookies, pixels and similar technologies for online advertising requires consent, and that the legal exemptions do not cover advertising. That includes remarketing tags from Google and Meta. Consent has to be specific and freely given, rejecting has to be as easy as accepting, and wording like 'by continuing to use this site you agree' is not valid consent. In practice, your remarketing tags should only fire after a visitor has opted in to advertising cookies. Expect your lists to be smaller than your raw traffic as a result, which is normal.
Is Google or Meta better for small business remarketing?
It depends on where your customers spend time and what you sell. Google remarketing can reach past visitors across partner websites, YouTube and, with the right setup, when they search again, which suits businesses where people compare quotes. Meta remarketing shows ads in Facebook and Instagram feeds, which suits visual products and local services with strong photos or short videos. Many small businesses start with one platform, prove it brings in enquiries, and only then add the second. Running both on a small audience can mean the same person sees your ads far too often, so set frequency limits where the platform allows it.
