Hey meg_kerry We’ve looked into this on our side, specifically around the Jan 8 Gemini rollout. We ran a before vs after analysis and also a difference-in-differences test (Gmail vs non-Gmail) to isolate any Gmail-specific impact.
At an aggregate level, Gmail CTR has not declined post-launch, in fact, it increased. When isolating our US base (where Gemini rollout began), we still don’t see an absolute drop in Gmail CTR. However, Gmail has underperformed slightly relative to non-Gmail domains over the same period.
So at this stage, we’re not seeing clear evidence of a material CTR decline directly attributable to Gemini. That said, Gmail’s relative performance has been weaker than other providers, so it’s something we’ll continue monitoring, particularly as rollout expands and adoption increases.
Would be interested to hear if others are seeing a different pattern.