Why did Google Ads impression delivery drop by 40%?

Introduction

A 40% drop in Google Ads impression delivery is a significant issue that demands immediate attention and a thorough investigation. This analysis will systematically identify, validate, and address the root cause while considering both short-term fixes and long-term strategic implications for our ad delivery system.

Step 1

Clarifying Questions (3 minutes)

• Looking at the scale of the drop, I'm thinking this might be a system-wide issue. Can you confirm if this 40% drop is consistent across all ad types and campaigns?

Why it matters: Understanding the scope helps narrow down potential causes. Expected answer: The drop is relatively consistent across different ad types and campaigns. Impact on approach: If consistent, we'll focus on system-wide issues; if not, we'll investigate specific segments.

• Considering the timing, I'm wondering if there have been any recent major updates to the ad serving algorithm or infrastructure. Have there been any significant changes deployed in the past week?

Why it matters: Recent changes often correlate with performance shifts. Expected answer: A major update was deployed to the ad serving algorithm three days ago. Impact on approach: If confirmed, we'll prioritize investigating the recent update's impact.

• Given the nature of ad impressions, I'm curious about any changes in user behavior or traffic patterns. Have we observed any unusual shifts in user engagement or website traffic recently?

Why it matters: External factors could be influencing impression delivery. Expected answer: Overall traffic has remained stable, but user engagement metrics have slightly decreased. Impact on approach: If confirmed, we'll explore potential issues with ad relevance or user experience.

• Thinking about data integrity, I'm concerned about potential measurement or reporting issues. Can we confirm that our impression tracking and reporting systems are functioning correctly?

Why it matters: Ensures we're addressing a real issue, not a data anomaly. Expected answer: All tracking and reporting systems have been verified and are functioning correctly. Impact on approach: If confirmed, we'll focus on actual performance issues rather than data discrepancies.