Retargeting campaigns show adverts to people who already visited you. They are the cheapest looking thing in most accounts and the easiest to overrate, because they follow people who were already interested.
How retargeting campaigns work
A visitor arrives, a marker is stored in their browser or matched to their account, and adverts can then be shown to that group elsewhere.
Consequently you are advertising to a warm audience rather than a cold one, which is why the numbers look so good. It is also why those numbers need reading carefully.
Why the reported results flatter
Somebody who visited your website, put something in a basket and came back the next day was probably coming back anyway.
The platform counts that sale as a win, because it showed an advert in between. That is not dishonest, and it is not the same as having caused the sale either. So treat retargeting numbers as the least reliable in the account, and judge them against total revenue rather than in isolation.
The honest test is to reduce or pause the campaign for a period and watch whether overall sales move. Very few businesses run that test, and most who do find the effect smaller than reported.
Who retargeting campaigns should follow
Not everybody who visited. Segmenting is where retargeting campaigns become useful rather than merely cheap.
- People who reached a checkout or an enquiry form and stopped.
- People who viewed a specific product or service page.
- Past customers, for a genuinely relevant follow up.
- People who spent real time on the site rather than bouncing.
Excluding matters as much. Take out people who already bought. Take out people who already enquired. Anybody who left within a few seconds should go too, since a visit that short says nothing at all.
How long retargeting campaigns should follow somebody
Match the window to how long the decision actually takes.
An impulse purchase deserves a few days. A considered service might deserve a month. Following somebody for six months after a single visit is where retargeting campaigns start irritating people and wasting money at the same time.
Shorter windows also raise the quality of the audience, because recent interest is far more predictive than old interest. If you are unsure, start short. Extending a window later is easy, while undoing the impression of having stalked somebody for a season is not.
How often retargeting campaigns should appear
Frequency capping exists precisely because unlimited repetition is unpleasant, and platforms will happily show your advert far more often than helps.
Set a cap. Rotate the creative so the same image does not follow somebody for weeks. Then check what the campaign actually delivered rather than assuming the cap was respected across every placement.
What the adverts should say
The audience already knows who you are, so repeating the introduction wastes the impression.
Answer the reason they left instead. That is usually price, uncertainty, delivery, timing or a missing detail. An advert addressing the real hesitation beats one repeating the original offer more loudly.
Write one advert for each reason. Retargeting campaigns work best when the message matches the segment, and that is easier than it sounds once the segments exist.
Where somebody abandoned a specific thing, showing that thing again is reasonable. Showing it eleven times is not.
Give people a reason to come back rather than a reminder that they left. A delivery promise, an answer about sizing, a note on how long the work takes: each of those moves somebody who was hesitating. A picture of the item they already saw does not.
Retargeting campaigns and privacy
The mechanics depend on consent and on browser behaviour. Both have tightened a great deal in recent years.
Audiences are smaller than they used to be, and they will keep shrinking. More of this now depends on people agreeing to be tracked. So a plan resting mostly on following people stands on ground that keeps moving. Building an email list is a more durable version of the same idea.
That is worth acting on early. The businesses least troubled by each new privacy change are the ones that were already collecting permission directly.
Where retargeting fits in a budget
It should be a modest share, because it can only work with the traffic something else produced.
A campaign spending most of its budget following existing visitors is optimising an audience it is not replenishing. Meanwhile the reported efficiency will keep looking excellent right up until the top of the funnel runs dry.
So set the share deliberately. Decide what proportion of the budget may go to retargeting campaigns, then spend the rest on reaching people who have never heard of you. That split is a decision rather than a default, and the platform will not make it for you.
Setting it sensibly means knowing what each paid channel is for, because retargeting campaigns only harvest what the others planted.
A sensible setup
Segment by what somebody did, exclude existing customers and enquirers, set a window matching your sales cycle, cap the frequency, and rotate the creative.
Then hold retargeting campaigns to the same standard as everything else: do total sales move when they run. That single question is worth more than the ratio the platform reports.
Review it twice a year. Audiences shrink, windows drift, and creative goes stale. Twenty minutes is usually enough to catch all three.
Frequently asked questions
What are retargeting campaigns?
Adverts shown to people who already visited you, using a marker stored in their browser or matched to their account. They advertise to a warm audience, which is why the reported results look so strong.
Why do the results look too good?
Because many of those people were coming back anyway. The platform counts the sale because it showed an advert in between. That is not the same as causing it, so judge these campaigns against total revenue.
How can I test whether it is really working?
Pause or reduce the campaign for a period and watch whether overall sales move. Few businesses run that test, and most who do find the effect smaller than the platform reported.
Who should I retarget?
People who reached a checkout or form and stopped, people who viewed a specific product or service, past customers for something relevant, and people who spent real time on the site. Exclude buyers, enquirers and instant bouncers.
How long should I follow somebody?
As long as the decision genuinely takes. Days for an impulse purchase, perhaps a month for a considered service. Six months after one visit is where these campaigns irritate people and waste money simultaneously.
How often should the advert appear?
Capped, and with the creative rotated so the same image does not follow somebody for weeks. Platforms will happily show it far more often than helps, so set the limit deliberately and check what was actually delivered.
What should the advert say?
Answer the reason they left, which is usually price, uncertainty, delivery, timing or a missing detail. The audience already knows who you are, so repeating the introduction wastes the impression entirely.
Is retargeting getting harder?
Yes. Retargeting campaigns depend on consent and on browser behaviour, both of which have tightened, so audiences keep shrinking. Building an email list is a more durable version of the same idea and does not rest on tracking.