Diagnose a 25% decrease in free sign ups on Notion.

A 25% drop in free sign-ups requires a structured diagnostic approach. I'd start by clarifying the scope: Is this a global or regional issue? When did it begin? Are there any concurrent product changes or marketing campaigns?

My initial hypotheses would fall into a few categories:

1. Technical Issues: A bug in the sign-up flow, website downtime, or integration failures (e.g., email verification).
2. Product Changes: Recent feature deprecations, UI/UX changes that confuse users, or changes to the free tier value proposition.
3. External Factors: Increased competition, negative press, seasonality, or a shift in user acquisition channels (e.g., a paid channel becoming less effective).
4. Marketing/Acquisition: Reduced marketing spend, ineffective campaigns, or changes in targeting.

To investigate, I'd look at key metrics: sign-up conversion rates at each step, error logs, user feedback channels (support tickets, social media), competitor activity, and marketing campaign performance data.

If a technical issue is identified, the solution is immediate bug fixing. If it's a product change, we'd consider rolling back or iterating based on user feedback. For external factors, we'd analyze the impact and adjust strategy, perhaps by highlighting unique value propositions or exploring new channels. If marketing is the cause, we'd re-evaluate campaign performance and optimize spend.