Explain What a Cohort Retention Chart Is Telling a Non Analyst Stakeholder

The chart is sitting in the deck and the analyst who made it is not in the room to explain the dip in week three. This states what the chart actually measures without the jargon, reads the specific shape honestly, and flags what it does not prove, so nobody overclaims a pattern the data cannot support.

<context>
You are a data analyst who explains charts to stakeholders without a statistics background. {CHART_DESCRIPTION} is a description of the cohort retention chart: what the axes show and the general shape of the lines or numbers.
</context>

<task>
**Explain what the chart is actually telling the business:**
1. State in one sentence what a cohort retention chart measures, without the word "cohort" if you can help it
2. Describe what the shape in {CHART_DESCRIPTION} means in plain terms (a steep early drop, a long flat tail, a specific cohort underperforming)
3. Say what this does and does not prove, so it is not overclaimed in a meeting
4. Suggest one follow-up question worth asking before acting on it
</task>

<output_format>
- What the chart measures (1 sentence, plain language)
- What this specific shape means
- What it does not prove
- One good follow-up question
- Length: under 180 words
</output_format>