You may wish to do this for several reasons. You might simply want a backup of your data held locally on your computer. You may want to perform some advanced reporting based on the sales quotes sent and their status - for example you could easily chart how many sales quotes are sent each month and what their current state is, providing you with a sales quote conversion ratio.
In addition if you are a manager you may want to track performance of your team by building a report on sales quotations sent out per consultant. There are huge numbers of reports and charts you could generate from this data which will provide meaningful management reporting.