Picture a woman who has visited your website a dozen times from your Facebook ads. She knows your name, your prices and your reviews. One evening she types your business name into Google, clicks, and books. As far as Google Ads is concerned, you just won a new customer.
You did win one. Google Ads did not.
That gap, between a customer who is new to your records and a customer your ads actually found, is where a lot of Demand Gen spend quietly goes. And Google has now built a setting aimed squarely at it. It is called new prospects mode, it is part of a feature called new customer acquisition, and for a small business running Demand Gen it is worth understanding before the next budget conversation.
The Customer Demand Gen Keeps Finding Already Knows You
Demand Gen is supposed to reach people who have not gone looking for you yet. Google's own description says so. In practice, a campaign left to its own judgment will drift toward the cheapest conversions it can find, and the cheapest conversions very often come from people who were already on their way.
We have written about what that looks like in the numbers. In Demand Gen Will Tell You It Worked. That Is Not the Same as Working., the campaign's reported conversions climbed while conversions from people searching the business name went down. The campaign was not creating demand. It was standing in front of demand that already existed and collecting the credit.
The agency Solutions 8 put the underlying problem in one line that is worth keeping: just because someone is a new customer does not mean Google generated them. A buyer who found you through Facebook, a referral or a truck in their neighbor's driveway still shows up as new when they finally search your name and click.
The first line of defense is simply not letting the campaign bid on people who already know you. That is what new customer acquisition does, in three increasingly strict versions.
Three Settings, Three Definitions of "New"
Google groups these under customer acquisition, one of its customer lifecycle goals. All three work in Demand Gen, Search, Shopping and Performance Max campaigns.
New customer value. The campaign still shows ads to everyone, but it bids harder for people who have not bought before, by adding an extra value you choose to every new-customer conversion. It needs purchase conversions and value-based bidding, so it is built for online stores.
New customers only. The campaign stops bidding on existing customers entirely and spends its budget on people who are not on your customer list. Google's help page says this setting is recommended only for businesses with strict acquisition budgets or with non-purchase conversion goals like lead generation. It is also the only one of the three that Google documents as working without a purchase goal, and it supports ordinary cost-based bidding such as Target CPA and Maximize conversions.
New prospects. Announced in May 2026, this goes a step further than new customers only. Google says it automatically filters out people who have bought from you, searched for your brand terms, visited your website or app, or engaged with your content or ads on Google and YouTube. The aim, in Google's words, is to reach only cold, brand-unaware audiences.
New prospects is the one that answers the problem above most directly, because brand searchers and repeat site visitors are exactly the people Demand Gen tends to take credit for. Two honest caveats before anyone switches it on. Google announced it as new for 2026 and has not yet published the same detailed help documentation for it that the other two settings have, including which bid strategies it supports. And like many announced features, it may not appear in every account at once. Look for it in your own account before you plan around it.
Google Only Knows Your Customers If You Tell It
Every one of these settings depends on Google knowing who your existing customers are. That sounds automatic. For most small businesses it is not.
Google offers something it calls autodetection. If you already track purchases as Google Ads conversions, it builds a list of past buyers from up to the last 540 days of campaign activity and uses it to separate new from returning. Online stores get this more or less for free.
A plumber, a dental practice or a roofing company does not track purchases in Google Ads. They track calls and form fills. Google only switches autodetection on when you are tracking purchase conversions, so for them it never starts. And if you import offline results, such as booked jobs from your CRM, Google's setup guide is explicit that autodetection does not work with offline conversions and you need to upload your existing customers through Customer Match. Either way, the customer list does the work that autodetection would have done.
Two numbers from Google's documentation matter here. A list needs at least 100 active members to be used at all. And Google warns that a list under 1,000 members may limit how well new customer acquisition works. Many local businesses have a customer file in that range or below, and a matched list is always smaller than the file you upload, because not every email address belongs to a signed-in Google user. We covered how to build that list properly in Your Customer List Is the Best Audience You Can Give Google Ads.
Then there is accuracy. Practitioners report results at both extremes. Solutions 8 described an early test of the feature in which, after uploading millions of customer records, Google reported 8 of a week's sales as coming from existing customers when the business's own records showed about 900. Andrew Lolk of Savvy Revenue has reported the opposite, recent accounts where Google's count of new customers came out about 98 percent the same as the business's own. His explanation is the useful part: the less data you give Google, the more often it cannot recognize a returning customer, and when it cannot tell, it counts them as new.
That default is the whole story for a small business. A thin customer list does not make the setting fail loudly. It makes it quietly generous.
Which Setting a Lead Generation Business Should Use
For a business that sells online, with purchase tracking and a healthy customer file, new customer value is Google's default recommendation and a reasonable place to start.
For a lead generation business, the choice narrows quickly. New customer value requires a purchase goal, so it is out. That leaves new customers only, which Google explicitly names as the fit for lead generation and which works with the Target CPA bidding most service accounts already use. New prospects is the stricter version of the same idea and is worth testing once it is in your account and its bidding requirements are documented.
The practical sequence for a service business looks like this:
- Get your customer list right first. Export past customers from your CRM, booking system or invoicing software, clean the email addresses and phone numbers, and upload it as a Customer Match list. Refresh it on a schedule, because a list from last spring does not know about this summer's customers.
- Start with new customers only. It is documented, it works with lead goals, and it removes the people most likely to be inflating your numbers.
- Test new prospects later, against the same list. The extra exclusions, brand searchers and site visitors, are where the real difference lies for Demand Gen, but test it as a change you can measure, not a switch you flip and forget.
What You Give Up
This is not free, and the tradeoffs land hardest on small accounts.
A smaller audience and fewer conversions. Every person you exclude is someone the campaign can no longer count. Some of those conversions were never really the campaign's, which is the point, but your reported numbers will fall, and a cost per lead that looked healthy will look worse. That is the honest number arriving, not the campaign breaking.
Split volume. Google says that when you use new customers only, you should run a separate campaign to reach existing customers. That divides whatever conversion volume you had between two campaigns. Andrew Lolk's rule of thumb is useful here: splitting a campaign that produces around a thousand conversions a month is usually fine, and splitting one that produces two hundred usually is not. Most small Demand Gen campaigns are well under the second number.
Existing customers still need you. It is tempting to treat past customers as free. They are not. Lolk describes a client where about 70 percent of existing customers needed a paid media touchpoint before they bought again, and says that excluding existing customers from another platform for six months hurt that business. If you remove repeat customers from Demand Gen, make sure something else, email, a separate campaign, a follow-up call, is still reaching them.
It may not produce more new customers. Solutions 8 reported that in their tests, switching new customers only off in Performance Max produced more first-time buyers, not fewer, and that it had never worked for them across several clients. That was an early version of the feature on large accounts, and detection has reportedly improved since. But it is a clear reminder that excluding people is not the same as finding new ones.
How to Turn It On and Judge It
The setup takes two steps, and the measurement is what makes it worth doing.
Define your existing customers. In Google Ads, open the Goals menu, go to Summary, and under the Customer acquisition panel select Set up. Choose the audience lists that contain your existing customers. For a lead generation business, that means your uploaded Customer Match list, and Google recommends adding website visitor lists too for better detection.
Choose the setting on the campaign. In your Demand Gen campaign's settings, find customer acquisition and choose to bid only for new customers, or new prospects if it is available to you and you have decided to test it.
Write down your starting point first. Before you change anything, note what share of your leads over the last month were genuinely new customers, according to your own records, not Google's. Lolk suggests a sanity check that works for any business: if you know from your own books that roughly one customer in five comes back, and Google is telling you almost nobody does, the customer data feeding the setting is wrong, and nothing built on top of it will be right.
Judge it by your records, not the dashboard. Give it four weeks or more. Then compare the number of genuinely new customers in your CRM, and what they cost, against your starting point. Google's reported conversions will almost certainly be lower. The question is whether the new customers you care about held steady or grew while the campaign stopped paying for people who already knew you.
And if you run Demand Gen, check the other setting that inflates its numbers while you are in there. New campaigns now count people who never clicked by default, which we covered in Demand Gen Now Bids on People Who Never Clicked. Google Turned It On for You.
When to Leave It Off
There are three situations where the right move is to wait.
Your customer list is tiny. If you cannot upload a list anywhere near 1,000 members, Google is telling you the setting may not work well, and the practitioner evidence says an unrecognized customer defaults to new. You would be paying for a filter with holes in it. Build the list first.
Your campaign is small. If splitting your Demand Gen campaign would leave each half with a trickle of conversions, the campaign will struggle to learn at all. Get volume first. Demand Gen has its own budget floor, which we set out in the Demand Gen guide, and new customer acquisition does not lower it.
It is your brand campaign. This one is about Search rather than Demand Gen, but it comes up. People searching your business name are, almost by definition, not cold prospects. Bidding extra to find new customers among them rarely adds new customers. It mostly adds cost.
Paying Only for the Customers Your Ads Find
Demand Gen's promise is reach, putting your business in front of people who did not know to look for you. New prospects mode is Google admitting, in product form, that the campaign does not always keep that promise on its own. Used well, with a real customer list and a clear before-and-after count, it gets your budget back to the job it was meant to do.
Used carelessly, with a thin list and no baseline, it is another setting that makes a report look different without making the business any bigger.
If you would like someone who works with these settings every day to set up the customer list, choose the right mode and measure it against your own books, that is part of how we run Google Ads management for small businesses. Either way, the question to ask of any Demand Gen campaign stays the same: how many of these customers did we actually find?
