In short, a lot. High quality advisors will take the time to prepare your company documentation thoroughly, in such a way that all relevant information is clearly and effectively laid out, and highlights the performance of the business. They identify the best pool of potential buyers, and directly market the opportunity to them, or have a highly relevant and active network of buyers. Additionally, they help Sellers prepare for any question that may arise during interview with potential buyers, and leverage their negotiation experience to maximize the deal value. They remove stress from the process, and manage the entire sale until an offer is accepted and the deal is closed.