1. Improved Deliverability: Lower spam complaints lead to higher inbox placement rates. 2. Better Sender Reputation: ISPs trust senders with low complaint rates, enhancing your sender reputation. 3. Higher Engagement: When your emails land in the inbox, they are more likely to be opened and engaged with. 4. Cost-Effectiveness: Reduced spam complaints can lower your email marketing costs by improving deliverability and reducing the need for additional services.