Generate a 500-word article outlining a comprehensive framework for defining and tracking key retention metrics for a SaaS business.  The framework should be adaptable to various SaaS models (e.g., freemium, subscription-based).  The article should include:</p>
<p>* **Defining Retention:**  Begin by clearly defining customer retention in the context of SaaS, differentiating between various types of retention (e.g., monthly recurring revenue (MRR) retention, customer churn rate, user engagement).<br />
* **Key Metric Identification:** Detail at least five crucial retention metrics relevant to SaaS, explaining their calculation methods and practical interpretations.  Include examples of how these metrics can be tracked using common SaaS analytics tools.<br />
* **Framework Structure:** Propose a structured approach to organizing and analyzing these retention metrics, illustrating how they interrelate and provide a holistic view of customer retention health.  Consider visual representations like dashboards or charts for effective communication of findings.<br />
* **Actionable Insights:** Explain how the identified metrics can inform strategic decisions related to product development, customer support, marketing, and pricing.  Provide specific examples of how variations in key metrics might signal the need for corrective actions.<br />
* **Advanced Considerations:** Briefly discuss more advanced concepts like cohort analysis, customer lifetime value (CLTV), and the limitations of relying solely on quantitative metrics.  Highlight the importance of qualitative data in understanding customer retention.  </p>
<p>The article should be written for a mid-level SaaS business manager audience, assuming some familiarity with basic SaaS metrics but requiring a structured explanation of how to build a comprehensive framework.</p>
<p>**Example Metrics:** (You may choose others, but include a rationale for your choices)<br />
* Monthly Recurring Revenue (MRR) Churn Rate<br />
* Customer Churn Rate<br />
* Customer Lifetime Value (CLTV)<br />
* Net Promoter Score (NPS)<br />
* User Engagement Metrics (e.g., daily/monthly active users)</p>
<p>**Output Format:**  The article should be structured with clear headings, subheadings, and bullet points where appropriate.  Include relevant examples and data visualizations (conceptual is acceptable).