Your sale can depend on the impression you make in the first nine seconds!  People surfing the web have the attention span of a goldfish and form their opinion of you very quickly so you have to catch their attention fast and find ways to keep them involved or they will click away to somebody more interesting without a backwards glance. There is even some concern that our electronically induced short attention spans might actually be changing our brain patterns permanently!
DSAs and Direct Sellers might find the information in The Fascination Study helpful in attracting and keeping new members.