The AdSense Auto ads vs manual debate is usually framed as lazy against careful. That framing is wrong in both directions. Auto ads are not a lazy option that earns less by default, and manual placement is not automatically the professional choice. Each one puts a different party in charge of the same three things: where ads sit, how many there are, and what they do to the page.
The details below come from Google’s own announcement, “Introducing AdSense Auto ads”, written by Violetta Kalathaki and Tom Long and published on 21 February 2018. The product has been updated since, so check the current AdSense interface for the formats on offer. The principles in the announcement still describe how it works.
What Auto ads actually do
Google’s announcement says Auto ads use machine learning and “show ads only when they are likely to perform well and provide a good user experience.” In practice, Google reads each page, decides whether there is room for an ad and which format fits, and places it. Auto ads can “identify any available ad space and place new ads there.”
Two consequences follow. First, the number of ads on a page is not fixed; it is a decision Google makes per page. Second, a page with fewer ads than you expected is not necessarily a fault. If the system judges that an ad would not perform or would harm the experience, the design is to show nothing.
That is a different contract from manual placement. With a manual unit you decide that an ad will appear in a given spot on every page that uses the template, and you accept the consequences for layout. With Auto ads you set the boundaries, through the formats you allow, and let Google decide inside them. Neither is wrong; they suit different sites and different owners.
Setting up Auto ads
Setup is deliberately small. Google’s announcement describes placing one piece of code between the head tags on every page, then choosing which ad formats to allow with toggles in the AdSense account. Most sites do this through a theme setting or a site template, so the code appears on every page without editing each one.
The snippet itself comes from your AdSense account and carries your publisher ID, so copy it from there rather than from any tutorial. The format toggles are where most of the real decisions sit, because each format you switch on is a type of ad Google may add to your pages without asking again.
AdSense Auto ads vs manual placement, side by side
The table compares the two on the points Google’s announcement addresses, plus the trade-offs that follow from them. It contains no revenue comparison, because Google published no uplift figures and none should be invented.
| Auto ads | Manual placement | |
|---|---|---|
| Who chooses where ads go | Google’s machine learning, per page | You, per template or per page |
| Setup | One code snippet in the head on every page, formats chosen by toggles | A code unit for each placement |
| Number of ads | Varies; shown “only when they are likely to perform well” | Fixed by your layout |
| Existing units | Kept; Auto ads “take into account all existing Google ads” | Stay as placed |
| Layout and speed control | Lower; new ads can appear in “any available ad space” | Higher, at the cost of more work |
Source: Google, “Introducing AdSense Auto ads” (21 February 2018).
You do not have to choose one
The most useful line in the announcement is the one most often missed. On existing manual units, Google says: “There’s no need to remove them if you don’t want to. Auto ads will take into account all existing Google ads on your pages.”
That makes a hybrid setup the sensible starting point for many sites. Keep the manual units you trust, typically the in-article placements you have already tested, and let Auto ads fill space you had not used. You keep control of the positions that matter most and test whether the extra placements earn their keep.
Watch the formats that change how a page feels. Anchor ads on mobile, for example, sit over the content as the reader scrolls. Whether that suits your readers is a judgement about your site, not a setting Google can make for you, and a toggle lets you switch a format off without touching the rest.
The real cost: control, layout and speed
Here is where manual placement still earns its effort. When Auto ads can place new ads in any available space, your layout is partly decided by someone else. Ads can land between paragraphs you wanted to keep together, or push content down while the page loads. Each extra ad is also more work for the browser.
If your pages already struggle on page experience, that matters. Our guide to a failed Core Web Vitals assessment covers how to find what is slowing a page. Check those reports before and after turning Auto ads on, so any change is visible rather than guessed at.
The other cost is understanding. With manual units, a change in earnings can be traced to a placement. With Auto ads, the placements themselves move, so a rise or fall in your AdSense RPM is harder to attribute.
Which to choose
Use Auto ads on their own when you have many pages, little time, and no strong view on layout. Use manual placement when your design matters to your readers or your pages are already slow. For most sites, the hybrid is the honest answer: manual units where you have evidence, Auto ads for the rest, and formats switched off when they hurt the experience.
Whichever you pick, test it properly. Change one thing at a time, compare like-for-like periods, and remember that seasonal advertiser demand moves earnings regardless of placement. If you are not yet approved, the AdSense requirements come first. And if you are wondering what each ad actually earns you, the answer has changed since this announcement: see does AdSense pay per click.
One limitation to be clear about. Google’s announcement describes how Auto ads decide, but it gives no figures on how they perform against manual placement, and no general figure would apply to your site anyway. Only your own before-and-after comparison can answer that.
Frequently asked questions
Do I need to remove manual ad units to use Auto ads?
No. Google says “There’s no need to remove them if you don’t want to”, and Auto ads take existing Google ads on the page into account.
Why are AdSense Auto ads not showing on some pages?
Auto ads are designed to show ads only when they are likely to perform well and provide a good user experience, so some pages may get few or none. Also confirm the code is in the head of every page and the formats you want are switched on.
Do Auto ads earn more than manual placement?
Google’s announcement gives no comparison figure. Test both on your own pages over comparable periods.
Where does the Auto ads code go?
Between the head tags on every page where you want Auto ads to run.
The takeaway Auto ads trade control for convenience, and Google designed them to work alongside your manual units. Keep the placements you have tested, let Auto ads fill the gaps, and check layout and speed before trusting the result.
