I would actually want to know... what exactly is Pre-sales in an organization?What are the roles of Executive Pre-sales?What is his task?Do the Pre-sales person work as sales person.. like to travel on field and bring new prospects?. Please somebody explain me... and help me

Titles very from company to company, an to be honest I have never heard of this position. It would sound as some assistant that helps the sales people prepare for their work.