Annotate notable date events

Before I publish these annotations to the org, make them actionable: surface the most likely metric affected for each event, estimate whether the effect is temporary or persistent, and mark which events need a follow-up analysis. Also highlight any overlapping dates that make attribution unreliable.

I added an annotation for the June 3 homepage redesign and sessions increased but conversion fell. The product manager, Aisha, insists the redesign was tiny; marketing suspects the email on June 10 pushed low-intent visitors. I do not have granular session-level labels to apportion blame. What is the likely explanation and the best next analysis to recommend so we can tell Aisha and marketing what to do?

We only add annotations after stakeholders ask why a spike happened, so patterns stay buried and teams repeat mistakes. What habit should I change to make annotations proactive and useful — a cadence, required fields, and who must sign off — and give the exact workflow to implement starting this week?