Tracking user activity is crucial for several reasons: - Personalization: Understanding user behavior allows for more tailored and relevant content. - Engagement Metrics: Measures like open rates and click-through rates (CTR) provide insights into how engaging your emails are. - Conversion Rate: By tracking actions like purchases, you can gauge the success of your campaigns in driving revenue. - Optimization: Data from user activity helps in A/B testing and improving email elements like subject lines, content, and CTAs.