Root cause a sudden decline in retention among hosts using Search

Problem Statement Description

Product context: Airbnb is a travel marketplace connecting guests and hosts; its products include stays, experiences, host tools, guest booking, trust and safety, payments, and reviews.

Airbnb has observed a sudden decline in retention among hosts who use Search. These hosts may be using Search to understand how their listings appear to guests, compare nearby listings, evaluate pricing and availability, or assess competitiveness in their market. The decline is unexpected and may affect host engagement, listing quality, supply health, and ultimately guest booking outcomes.

Your task is to frame and investigate the root cause of this retention drop. Focus on how you would define the anomaly, validate whether it is real, segment the affected host population, inspect product and marketplace changes, and prioritize hypotheses without jumping directly to a solution.

Your investigation should consider:

- How “host retention among Search users” should be defined, including numerator, denominator, time window, and expected baseline

- Whether the decline is global or concentrated by geography, host type, listing category, tenure, device, traffic source, or search behavior

- Instrumentation and data-quality checks, including event logging, attribution, identity, cohorting, and recent analytics changes

- Product changes that may have affected hosts’ Search experience, such as ranking visibility, filters, pricing displays, map behavior, or logged-in host flows

- Marketplace or seasonal factors, including demand shifts, regulation, competition, cancellations, pricing pressure, or supply changes

- Host-side pain points that could reduce continued use, such as poor discoverability, confusing ranking feedback, lower inquiries, or perceived unfairness

- Evidence needed to distinguish correlation from causation, including experiment history, release timelines, cohort comparisons, and qualitative host feedback

- Immediate mitigation and longer-term prevention, including monitoring, alerting, ownership, and follow-up analysis

The goal is to demonstrate a structured RCA approach that protects Airbnb’s host supply health and marketplace trust while identifying the most likely drivers of the sudden retention decline and the next steps needed to confirm, mitigate, and prevent recurrence.