A prospect who has engaged with marketing efforts and meets specific criteria indicating a higher likelihood of becoming a customer. MQLs have demonstrated interest and engagement, such as downloading content, attending webinars, or interacting with marketing campaigns, making them more promising than general leads. Typically, MQLs are identified based on behaviors or attributes that align with the company's Ideal Customer Profile (ICP) and are considered ready for further engagement by the sales team. They are a key stage in the lead qualification process, helping to prioritize prospects who are more likely to convert into sales.