Remarketing, also called retargeting, puts your ads back in front of past visitors to your website. At Good At Marketing it is part of our Google Ads management, which costs $600 to $1,000 a month plus ad spend; see the pricing page. The sections below cover the setup and where Google sets limits.
By Donnie Strompf. Updated October 2026.
What does a remarketing setup involve?
Our Google Ads management page lists remarketing among the campaign types added when a goal calls for it. Google’s help pages, which we read on October 19, 2026, describe six tasks, and each one has to happen in the account whoever does it.
- Tag the site. Google Ads Help says visitors join a segment within seconds of loading a page that carries the Google tag, or the tag plus an event snippet (How your data segments work). A new segment starts empty and fills only as people visit, so the tag has to be on the pages you care about before anything can run.
- Write the rules. A rule decides who joins a segment, such as everyone who visited one URL. Google’s example is an airline that puts visitors to its flight-deals page into a 30-day segment. As an illustration, a remodeler could add anyone who viewed a kitchen page and leave out anyone who reached the thank-you page.
- Set the membership duration. Google gives 30 days as the default and 540 days as the maximum on Search and Display. It advises a length close to your sales cycle, with days for movie tickets and months for cars as its examples (How your data segments work).
- Attach segments to campaigns. For Search ads Google describes two uses: change bids on keywords you already run when the searcher is a past visitor, or bid on extra keywords only for past visitors (About your data segments for Search ads). Its list of other uses includes Display and YouTube, plus dynamic remarketing that shows the products or services someone viewed.
- Add customer lists. Customer Match takes a file of customer information you collected, then shows ads to those people when they are signed in to Google on Search, YouTube, Gmail or Display (About Customer Match). Memberships expire after 540 days, and Google says to keep at least 100 members added or updated in that window.
- Exclude people. Google’s policy lets an advertiser fill a negative remarketing list with people who should not see the ads, and bars using a negative list for positive personalization. It adds that ads are not guaranteed to be shown or withheld for the named users (Restricted targeting in Personalized advertising).
Before hiring an agency, confirm who installs the tag and who owns the ad account, because both decide what you can take with you.
Who is remarketing for?
Remarketing needs two things: people who already visited, and a next step they have not taken. Three kinds of business tend to fit, and each has a size or timing question to settle first.
A business with a long decision. A remodeler or an accountant may wait weeks for a buyer who is comparing quotes. Google ties the membership duration to the sales cycle, so the list can stay open as long as the decision usually takes. If your buyers decide in a day, a short window keeps the ads from following people long after the need has passed.
A site with steady visits and a clear action. A segment needs 100 active visitors in the last 30 days before its ads can serve, which works out to roughly three or four new active visitors a day. Google counts active users differently from Analytics, so a site that looks big in Analytics can still show a small list in Google Ads. Read the audience size in the account before you pay for remarketing creative.
A business with a customer file. A rental company or a service-plan seller already holds names, and Customer Match turns that file into an audience. It suits repeat purchases, such as renewals and refills. In our view, a business with no customer file yet can start with segments built from site visitors.
A practice that promotes health services should read the next section first. Our Google Ads for medical practices page covers the practice side.
For the searches that bring new visitors to the site, see Google Ads search campaigns.
What do Google’s rules limit?
The name. Google Ads now labels remarketing as “your data” and the groups as data segments. You may still see “remarketing” in quotes and reports, and the rest of this page uses both.
Sensitive categories. Google’s restricted targeting policy lists Health among its sensitive interest categories. Advertisers promoting in one of them lose the audiences they build themselves, such as uploaded customer lists and site-visitor segments. Audiences that Google builds, such as in-market segments, stay available (Google’s restricted targeting policy, viewed October 19, 2026).
Google’s Health page covers chronic conditions, counseling and some procedures, so its examples are the place to check your own service (Health in personalized advertising, viewed October 19, 2026). Your compliance contact can say whether your ads fall in the category, and the policy has an appeal route for a decision you think is wrong.
Data rules. The policy bars sending personally identifiable information to Google through segment tags or product feeds. It also bars using segments to reach an overly narrow audience, including when location or other criteria shrink the group to a handful of people. Google may show a label that tells people their ad was personalized, and the policy says not to hide or change it.
Consent and cookies. Google’s policy page lets you stop collecting data for visitors who do not want personalized ads, using the allow_ad_personalization_signals parameter, and points advertisers to what a privacy policy should say about data segments. Google’s segment page puts any duration limits under applicable law on you.
If a list will not fill, the segment page says to confirm that the cookies it names are in place on your site and to allow 48 to 72 hours for a new list. Google’s Customer Match page adds that Apple’s App Tracking Transparency rules can affect segments on iOS 14 traffic.
What should you measure?
Start with the Audiences page under the Campaigns menu in Google Ads, which Google says reports on segments and exclusions. Check each segment’s size and whether it is Open or Closed, since a Closed segment stops adding visitors. Then read conversions and cost per conversion for the campaigns that use the segment, set beside the same figures for your Search campaigns.
In our view, remarketing reports can flatter the campaign. Someone who was already about to call may click a remarketing ad on the way, so a good number inside the segment does not prove the ad caused the call. Ask your agency to report the segment apart from the rest of the account.
On the Display Network and in Video campaigns, add frequency. Google’s frequency capping page says the setting limits how often ads appear to the same person and that Display counts only viewable impressions toward a cap. The setting is not supported in Demand Gen campaigns (Use frequency capping, viewed October 19, 2026).
To compare audience sizes with Google Analytics, Google says to use the Advertising segment in GA4, which is closer to the users eligible for Google Ads. Count a conversion the way your own team does, since a call nobody answers is not a lead. Our guide How much should you spend on Google Ads? A break-even method turns a lead’s value into a budget, which sets a sensible ceiling for remarketing too.
What list sizes does Google state?
The table reads Google’s help pages for the minimum a list needs before ads can serve.
| List type | Minimum Google states | Typical use |
|---|---|---|
| Website visitors | 100 active visitors or users, last 30 days | Bring back people who left |
| Website visitors or app users, Search ads | 1,000 cookies | Bid more on repeat searches |
| Customer Match, new lists | 100 active users | Reach past customers |
| Customer Match, pre-2024 lists | 1,000 matched users | Same, on older uploads |
| YouTube users | 100 active visitors or users | Re-engage video viewers |
| App users on Display and YouTube | None stated by name | Re-engage app installs |
| Lead form segment | None stated | People who sent your form |
The 100-user figure comes from How your data segments work, which says “visitors or users” for all three networks and leaves app users unnamed in the size section. Its Customer Match rows reflect its note that lists uploaded or refreshed after February 1, 2024 follow the 100-user rule. The 1,000-cookie figure comes from About your data segments for Search ads, which applies it to “website visitors or app users” on Search. The lead form row rests on About your data segments, which describes that segment and gives no minimum.
All three pages were read on October 19, 2026. When Google’s pages disagree, trust the size and status the account itself shows.
The Google Ads cost guide explains the fee, and the guide Google Ads vs Meta ads for lead generation: which should a local business run? compares the two platforms.
FAQ
What does remarketing cost on top of Google Ads management?
Remarketing has no separate price. It is part of Google Ads management at $600 to $1,000 a month, and the ad spend you pay Google is separate, as the pricing page lists. If you want remarketing without the rest of the management, ask on the call.
Is retargeting the same as remarketing?
The two words describe the same practice: showing ads again to people who already visited your site or used your app. Quotes and reports may use either one, so ask which lists and which networks a quote covers. A line reading only “retargeting” does not tell you that.
How long should someone stay on a list?
Changing the length applies to everyone already on the list. Cutting a 60-day list to 30 days removes anyone who joined 31 to 60 days ago, while extending a 30-day list to 60 keeps current members for up to 60 days. A closed list with a short duration may become too small to use for targeting.
Can we use our customer email list for ads?
Customer Match works from contact information your customers gave you, and Google says those people see the ads when signed in to their Google account, so not every name on a file will match. Google also bars sending personally identifiable information through segment tags. Ask your counsel what consent covers your file.
Can people who already bought be left out?
Past buyers can be excluded from a campaign. Open Audiences in the Campaigns menu to see exclusions beside the segments in use, and check it after launch. Google adds that automatically created segments, such as conversion-based customer lists, cannot be edited, so ask your agency which exclusion lists exist and who maintains them.
Does the website need to mention remarketing?
Google ties data segments to your privacy policy, so a developer or counsel should read its policy page before the tag goes live. Google may also show people a notice that an ad is personalized, and you may not hide it. Visitors who opt out of personalized ads can be left out of collection.
Next step
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