Pre-Sales is the process of activities carried out before the customer has been acquired.
Pre-Sales is often introduced into technology sales teams when the technology or service on offer is particularly complex. Pre-Sales engineers become the technology/solution expert and trusted advisor to the customer.
While a sales rep cannot afford to be bogged down with the deeper technical aspects of the solution, and move away from the commercial side of the sales process, the Pre-Sales team can support them by offering a higher level of detail to future customers.