Google Ads Smart Bidding: Why Max Conversions & Conversion Value Beat Target CPA or ROAS (Most of the Time)

Most advertisers accidentally cap their own growth in Google Ads.

Not because of bad targeting.
Not because of budgets.
Not because of the algorithm.

Because of one setting:

Target CPA or Target ROAS.

They sound smart.
They feel “efficient”.

But they usually just limit scale and leave money on the table.

Here’s the simple truth

Target CPA / ROAS tells Google:

“Only buy conversions at this exact price… or don’t spend.”

So Google:

• skips auctions
• reduces reach
• underspends your budget
• slows learning

You get cheaper leads… But fewer of them.

And most businesses don’t want cheaper.

They want more customers and more revenue.

Max Conversions / Max Conversion Value = let the natural order run

When you remove caps, you let the system do what it’s built for:

• enter more auctions
• gather more data
• find more buyers
• scale faster

It simply asks:

“How many conversions can I generate with this budget?”

That’s usually the right question.

Yes, CPA might rise slightly. But if you get 40–80% more customers, revenue almost always wins.

That’s just economies of scale.

If it doesn’t work, it’s not bidding

If Max Conversions struggles, the issue isn’t strategy.

It’s usually:

• weak ads
• weak landing page
• weak offer
• broken follow-up systems

Slapping a CPA or ROAS cap on top doesn’t fix fundamentals.

It just hides the problem and throttles growth.

The rule of thumb

For most growing businesses:

Start with Max Conversions or Max Conversion Value.
Scale first. Optimise later.

Use caps only when you’re mature and protecting margins, not when you’re trying to grow.

Because in Google Ads:

Efficiency protects.
Volume grows.

And growth is what actually builds businesses.