Sales builds alignment between the vendor and buyer, through the development of Problem-Solution Fit, by understanding the needs of the buyer, helping to visualize, account for, and transition to a new way of doing business.
Often, this is driven as much by emotion as it is by logic, so Sales needs the support of Marketing to ensure that the buyer’s needs are met at commercial, solution, and emotional levels.
And Marketing needs Sales' insights on the market to execute a cohesive and coherent buyer experience.