What is retargeting?
Retargeting is advertising shown specifically to people who already interacted with your store, such as visiting a product page, adding to cart or buying before.
Worked example, not a result
Segmenting by what the visitor actually did
Say a store had 7,200 people view a product page in a week, and 655 of them added something to the cart without buying.
Treating those as one audience wastes money in both directions. The 655 who added to cart were close to a decision, and a reminder with a clear delivery promise often finishes the job. The rest of the 7,200 include people who bounced in four seconds, people comparing prices, and people who were never in the market. Showing all of them the same ad at the same frequency spends most of the budget on the least interested group.
There is also a segment stores forget: past customers. They are the cheapest people to sell to and the most likely to buy again, and they usually deserve a different message about a new range or a reorder rather than the product they already own.
The visitor counts above are an example.
Why it matters
Retargeting sits between the visitors lever and the conversion lever. The visitor is already paid for, so the question is not whether to buy traffic but whether a second impression is what converts them, and that is a much smaller question than it is usually treated as.
It is also where reported performance is least trustworthy. These audiences are people who already showed intent, so a good share of them would have returned without an ad. That means the numbers look excellent and the incremental contribution can be modest, which is exactly the situation a holdout test exists to settle.
For a store owner the practical use is a ceiling. Keep retargeting budgets proportionate to the traffic feeding them, segment by what the person actually did, exclude recent buyers from ads for what they just bought, and spend the rest on finding people who have never heard of you.
Common mistakes
- Running one audience for every visitor. Someone who reached the checkout and someone who bounced from the homepage need different messages and different budgets.
- Leaving recent buyers in the audience. Showing people ads for the item now sitting in their hallway wastes money and reads as carelessness.
- Letting the budget scale with ambition instead of with traffic. A small audience shown ads constantly produces high frequency, rising costs and irritation.
- Judging it on reported return alone. These are the campaigns most likely to be credited with sales that were already coming, so the honest test is what happens to total revenue when they pause.
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