Arnau Vendrell's logbook

Co-CEO & Head of CRO

Nuclear engineer and Jazz musician by training. Travel enthusiast (68 trips so far) and AI fan.

CPA optimization in Google Ads

We stopped a Google Ads campaign from dying over its CPA

Setting CPA off first-sale margin works until someone bids on a customer's accumulated value. In an account with over 1,500 advertising-acquired customers, the 90-day multiplier is 3.17x on margin: that is the differential value in Google Ads auctions.

Read the full entry August 20, 2026

#cro#google-ads#web-analytics

We help you scale your business.

The log archive

Conversion uplift in Google Ads

Arnau Vendrell

How a qualification system gives Google Ads what the platform alone can't

Google Ads optimizes toward whatever you tell it a conversion is. Feed it every lead alike and it learns to bring you more of the ones that never buy.

Read the full entry June 29, 2026

#cro#google-ads#ai