Your Smart Bidding Is Optimizing for the Wrong Thing

Here is a common situation.

A client comes in. Their Google Ads account looks great on paper. Smart Bidding is dialled in. Target CPA is hitting the number. Conversion volume is up 40% quarter over quarter.

And their revenue is flat.

When you dig into the data, the pattern is always the same. The algorithm learned what counts as a conversion. It got very good at producing more of them. What it produced is not what the business actually needs.

The Conversion Definition Problem

Most accounts are optimizing to a conversion event that was defined by whoever was running the account three years ago. Usually it is a form fill. Sometimes it is a PDF download. Occasionally it is a thank you page that fires on every form submission, including the sales team entering test data.

Smart Bidding does not care. It will find more of whatever you told it to find. Cheaper, faster, in larger volumes.

If your conversion event is garbage, Smart Bidding becomes a very efficient garbage compactor.

What Actually Happens in Accounts

Last month I audited an account spending €40k a month on Google Search. Target CPA set to €45. Conversions stable at around 900 a month.

Qualified leads reaching sales? Around 60 a month.

The other 840 were bots, junior marketers testing the form, contact forms completed by competitors fishing for pricing, and legitimate users who were never going to buy.

The algorithm was not broken. It was doing exactly what it was told to do. The problem was that nobody had revisited the conversion definition since the account launched.

The Fix Is Not Glamorous

Everyone wants the fix to be a bidding change. A new automation. A clever audience layer.

The fix is almost always in the conversion column.

Import offline conversions from the CRM. Pass through sales qualified status, not form fills. If that is not possible for platform reasons, at the very least assign values to conversions based on expected quality. A lead from the pricing page is not the same as a lead from the whitepaper download. Treat them differently.

Google has been telling people to do this for years. Very few accounts actually do.

Why This Keeps Happening

Because the person who set the account up is not the person who answers to the CEO when revenue misses. Because CRM integrations are someone else's job. Because the marketing team has incentives tied to lead volume, not revenue.

So Smart Bidding keeps happily optimizing to the wrong outcome. And every QBR includes a slide showing how much CPA has improved.

If you want to know whether your Smart Bidding is actually working, do not ask the platform. Ask your sales team whether the leads they are getting are any better than last quarter.

That is the only report that matters.