In brief: Remarketing lists for search ads, now called your data segments in Google Ads, let a Search campaign bid differently or show different ads to people who already visited your website. Google recommends the Observation setting for all Search campaigns because it does not change who can see your ads. Bid adjustments for these segments run from -90% to +900%, but Smart Bidding strategies do not use manual bid adjustments. Customer Match Targeting and manual bid adjustments need 90 days of Google Ads history and more than USD 50,000 in lifetime spend; other policy-compliant accounts get Observation and exclusions. Kosmonk IT Pvt Ltd, a digital marketing agency in Ahmedabad, recommends adding a list in Observation first and judging it on cost per conversion.
Picture the Monday morning ad performance review. Someone who read your pricing page last week is back on Google today, typing almost the same search. Remarketing lists for search ads let you treat that person differently. You can bid a little more for them, show them a different ad, or both. This guide covers the settings that decide whether it actually works.
Key Takeaways
- Google recommends the Observation setting for all Search campaigns.
- Bid adjustments for these lists can run from -90% to +900%.
- Smart Bidding, where Google sets bids for you, ignores manual audience bid changes.
- Most small accounts can only use Customer Match lists for Observation and exclusions.
- Ads that promote health services cannot use your own audience lists.
What Are Remarketing Lists for Search Ads?
They are lists of people who already visited your website, attached to a Google Search campaign. When someone on the list searches again, you can bid more, change the ad, or buy keywords you would normally skip. Google now calls them “your data segments”, having renamed “remarketing” to “your data”.
Google’s help page on data segments for Search ads describes the idea plainly. You can “tailor your bids and ads to these visitors when they’re searching on Google and search partner sites”.
The logic is simple. A person who read your services page and then searches again is usually closer to deciding than a stranger typing the same words. Paying a little more for that search can make sense. Showing that person a different message often makes even more.
You build a list with the Google tag, a small piece of code on your site, which adds visitors as they arrive. The list then sits in your account until you attach it to a campaign or an ad group.
How Is This Different From Ordinary Retargeting?
Ordinary retargeting follows people to other websites and YouTube with your ad. Remarketing on Search works the other way round and waits. Your ad only appears when the person searches for something you bid on. So you reach them at the moment they are actively looking again, and never in between.
That changes what can go wrong. Our guide to retargeting done properly covers how long people stay on a list, how often they see an ad and who to leave out. Those choices apply here too, so this post sticks to what is different on Search.
The biggest difference is that you are not interrupting anyone. The person chose to search. Your job is to make sure your ad is the one they see, with a message that fits someone who already knows you.
Observation or Targeting: Which Setting Should You Pick?
Start with Observation. It keeps your campaign showing to everyone it reached before, and it reports past visitors on their own. Targeting is different. It narrows the campaign so it only shows to people on the list. Google recommends Observation for Search campaigns, so keep Targeting for one clear job.
Google’s Targeting and Observation help page says the Observation setting “won’t change who can see your ads or where they can show”. It also says Observation “is recommended for all Search campaigns”. Adding a list this way costs you no reach at all.
Targeting has one good use on Search: broad keywords you could not afford to buy for everyone. Google’s own example is that you “could bid on more broad keywords only for people who have previously purchased from your site”.
Here is an illustration with invented details. Say an insurance broker in Navrangpura bids on specific searches such as “term insurance for a 35 year old”. A one-word search like “insurance” would be far too broad and costly to buy for everyone. For somebody who already asked for a quote, it may be worth it. Put that keyword in its own ad group, set to Targeting, so only past visitors ever see it.
How Much Should You Raise Bids for Past Visitors?
Less than you might expect, and only if you set bids yourself. Google allows bid adjustments on these lists from -90% to +900%. Its own example is a 25% rise for people who visited in the last 30 days. If your campaign uses Smart Bidding, where Google sets each bid automatically, a manual audience adjustment is simply not used.
Google’s bid adjustments help page lists your data segments for Search ads with a range of -90% to +900%. That range is wide, and the top of it is rarely sensible for a small account.
Here is how the maths works, with invented figures. As an illustration, say your maximum bid on a keyword is ₹40. A 25% adjustment for past visitors makes it ₹50 when someone on the list searches. Everyone else is still bid at ₹40.
Smart Bidding changes the picture. The same help page says “If you make a manual bid adjustment to your automated Smart Bidding strategy, it won’t be supported”. That covers Target CPA (a target cost per sale or lead), Target ROAS (a target return on ad spend), Maximize conversions and Maximize conversion value. So typing +25% does nothing in those campaigns.
The list still helps, though. Google says first-party segments added in Observation “will be used as signals for Smart Bidding strategies”. So with Smart Bidding, add the list in Observation and let the system use it. Our guide to Google Ads cost in India covers how bidding choices shape what you pay per click.
How Big Do Remarketing Lists for Search Ads Need to Be?
Big enough for Google to use them, and Google’s own pages disagree on the number. Its Audience manager page says a Search segment needs at least 100 active users in the last 30 days. An older page on Search segments still says 1,000. Your account’s size column settles the question for your own list.
The newer Audience manager help page puts it at 100. It says the “Google Search Network must have a minimum of 100 active visitors or users within the last 30 days”. The older page says a list “needs to have a minimum number of 1,000 cookies” first. Cookies are small files a browser keeps for each visitor.
We would not guess between them. Open Audience manager in your account and read the size column for the Search network. Google says these columns “show how many people on your website data segment could be reached on each network”. If your list is too small on Search, the account tells you there.
For a small site, start with one broad list of all visitors, kept as long as your sales cycle needs. Google caps membership for these lists at 540 days. A narrow list of people who viewed one page will often be too small to use.
Customer Match on Search: Who Can Use What
Customer Match means uploading your customers’ emails or phone numbers. Small accounts can usually only watch that list and exclude it. Targeting and manual bid changes need 90 days of Google Ads history. They also need more than USD 50,000 in lifetime spend. Below that line, you get Observation and exclusions only.
Google’s Customer Match policy sets out that split. Spend in other currencies is converted to US dollars at the average monthly rate. Most small Indian accounts are below the line, so plan on Observation.
The data rules matter just as much. You “may only upload customer information that you collected in the first-party context”. That means people who gave you their details directly, such as on your own enquiry form. Your privacy policy must also say you share customer data with service providers. And you need consent where the law asks for it. Our guide to email marketing in India covers consent under India’s data protection rules.
Customer lists also expire. Google’s Customer Match page says memberships expire after 540 days. To keep a list eligible, at least 100 members must be added or updated in that time. So add new enquiries to the list regularly.
One more limit catches clinics. Under Google’s personalized advertising policy, health is a sensitive topic. If you promote health services, you cannot use your own audience lists. That rules out Customer Match and your data segments. So a doctor or hospital has to rely on good keywords and clear ads.
How Do You Know It Is Working?
Compare the people on the list with everyone else in the same campaign. Google’s Audiences report, under the Campaigns menu, breaks results down by segment. If past visitors convert at a better rate for a similar cost, the list is earning its place. That is the point to test a modest bid change.
Judge the list on enquiries. Past visitors often click more because they recognize you, and a higher click rate alone proves little. Three numbers are worth comparing between the list and everyone else:
- Conversion rate. Do past visitors turn into enquiries more often?
- Cost per conversion. Your CPL (cost per lead) from the list should be lower, or the bid change is not paying for itself.
- Share of conversions. If the list brings only a handful of enquiries a month, a big bid change will barely move the total.
Keep one detail in mind. Google only reports observation data where the list and your other settings overlap. So the numbers cover people on the list who also matched your keywords.
Give it time before deciding. A small list produces small numbers, and a week of data can swing either way. Check it as part of your monthly Google Ads review, alongside search terms and budgets.
Where to Start
Remember one thing: remarketing lists for search ads work best as a quiet layer on top of the campaign you already run. This week, open Audience manager and check the Search size of your all-visitors list. If it is big enough, add it to your Search campaign in Observation.
Leave the bids alone for a few weeks, then read the Audiences report.
If you would like a second pair of eyes on the setup, our Google Ads team in Ahmedabad can review it with you.
Frequently Asked Questions
What is the best digital marketing for a jewellery showroom?
Yes. Google renamed them, so in the account they now sit under “your data” and are called data segments. You still add them to Search campaigns and ad groups, and you can still bid differently for people on them.
Should I use Observation or Targeting?
Use Observation for almost every Search campaign. It keeps your full reach and shows past visitors in their own report. Use Targeting only for an ad group meant for past visitors alone, such as broad keywords.
Do audience bid adjustments work with Target CPA or Maximize conversions?
No. Google says manual bid adjustments are not supported with Smart Bidding. Add the list in Observation and leave the bid alone. Google then uses the list as a signal when it sets your bids.
How many visitors do I need?
Google’s pages give two figures, 100 active users in 30 days and 1,000. Check the Search size column in Audience manager, which shows whether your own list can be used on the Search network.
Can a clinic use remarketing on Google Search?
Not for health services. Health is a sensitive topic in Google’s rules, so a clinic promoting it cannot use its own audience lists. Clinics do better with tight keywords, clear ads and a strong landing page.
