Simplicity: The no.1 weapon of the salesperson

According to a certain famous study by Microsoft, published several years ago, the average person has the attention span of  just 8 seconds for most things. Though this is a very controversial statement, there is a trend in modern society that can't be denied:

Times are fast, people don't have time to spend on anything complex, and catching their attention is becoming increasingly difficult. However, there's one weapon that salespeople still fail to use properly, and that's simplicity.