This whitepaper outlines best practices for following up with Marketing Qualified Leads (MQLs). It categorizes inbound leads into four main types: Direct Requests, Pre-Qualified Leads, Content Downloads/Information Seekers, and Browsers. Each category is defined with specific characteristics and recommended follow-up strategies. For Direct Requests, immediate contact is emphasized, ideally within 10 minutes, to maximize the chances of conversion. Pre-Qualified Leads are identified based on external factors and should be treated as target accounts for outreach. Content Downloads represent prospects in the information-gathering phase, requiring timely follow-up to maintain engagement. Browsers are the least engaged and should be approached with a more passive strategy. The document also discusses the importance of account mapping and leveraging known information to enhance outreach effectiveness. Overall, the whitepaper serves as a comprehensive guide for sales development representatives to effectively manage and prioritize MQL follow-ups.