Retargeting Ads: How to Bring Back Patients Who Didn't Book
Here's something most clinics never think about: the majority of people who click on your ad or land on your website the first time were never going to book that same day. They were checking, comparing, maybe planning to ask a family member first. If you only ever run ads to new people, you're spending your whole budget on introductions and never following up.
What retargeting actually is, without the jargon
It just means showing an ad specifically to people who already visited your website or engaged with your Facebook page, rather than to a fresh, cold audience. Facebook and Google both let you build this kind of audience automatically once you have a small tracking pixel installed.
Why it tends to work better than fresh ads
Someone who already looked at your clinic's page knows who you are. You're not introducing yourself again — you're reminding someone who was already considering you, at a moment when a nudge might be exactly what tips them into booking. Cost per click for retargeting audiences is also usually lower, since Facebook and Google know these people already showed interest.
A simple setup that works for most clinics
- Anyone who visited your website in the last 14 days but didn't click "Book Appointment" or WhatsApp — show them a reminder ad, maybe with a small nudge like a limited-time offer
- Anyone who messaged on WhatsApp but the conversation went quiet — a gentle follow-up ad a few days later, not immediately, can bring some of them back
- Anyone who watched most of a Reel or video ad — they're clearly interested enough to keep watching, worth a smaller retargeting budget aimed just at them
How much of your budget should go here
For most clinics just starting out, something like 20-30% of total ad spend on retargeting and the rest on reaching new people is a reasonable split. As your website traffic and page engagement grow, retargeting tends to become more valuable, since you simply have more warm people to work with.
The thing people get wrong
Retargeting someone the same day they visited, aggressively, across every platform, tends to feel intrusive rather than helpful. A day or two of space before the reminder shows up usually performs better than trying to catch someone the moment they leave your site.
Frequently Asked Questions
Do I need a large ad budget to start retargeting?
No — retargeting audiences are usually small to start, so even a modest daily budget can meaningfully cover people who already showed interest.
How long should someone stay in a retargeting audience after visiting my site?
14 to 30 days is typical for most clinics — long enough to catch people still deciding, short enough that the ads stay relevant to recent visitors.
Is retargeting only possible on Facebook, or does Google Ads support it too?
Both support it — Google calls it 'remarketing' and can show ads across its display network and search, while Facebook shows it in feed and stories.
Will retargeting ads feel creepy or intrusive to patients?
They can if overused — spacing out the reminders and avoiding showing the exact same ad repeatedly usually keeps it feeling helpful rather than invasive.
Want help implementing this?
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