22 July 2026

Google Ads

Why did my CPA jump after a site change?

Landing page swaps, migrations and compliance edits all move CPA. A structured way to find which change did the damage.

Daniel Whitehouse

Daniel Whitehouse, performance marketing consultant

Build the timeline first

Full copy for this section is being written. In the meantime, ask me about it directly and I will talk you through what I look for.

Split traffic change from conversion change

Full copy for this section is being written. In the meantime, ask me about it directly and I will talk you through what I look for.

Landing page effects

Full copy for this section is being written. In the meantime, ask me about it directly and I will talk you through what I look for.

If this sounds like your account, the audit is the fastest way to know for sure.

Tracking effects

Full copy for this section is being written. In the meantime, ask me about it directly and I will talk you through what I look for.

The like-for-like comparison that settles it

Full copy for this section is being written. In the meantime, ask me about it directly and I will talk you through what I look for.

Related service: Google Ads turnaround

Free download

The Google Ads audit checklist

The twelve checks I run on every audit, as a one-page PDF.

12 checks. 1 page. No follow-up sequence.

More in Google Ads