Improved Engagement: By ensuring that your subscribers are genuinely interested, you increase the likelihood of higher open rates and click-through rates. Better Deliverability: A cleaner list reduces the number of bounces and complaints, which in turn improves your email deliverability. Compliance: It helps in staying compliant with data protection regulations like GDPR and CAN-SPAM. Cost Efficiency: Most email marketing platforms charge based on the number of subscribers. Keeping your list clean can help you save on costs.