According to an article from E-Commerce Times:

“Up to 70 percent of online shoppers abandon their shopping carts before completing the checkout process…”

That’s quite a few missed sales. The article goes on to give some very common reasons why people abandon their sales:

• Convenient Shopping
• Alternative Payment and Credit Vehicles
• Robust Security

Easily one of the most, if not the most, frustrating aspects of doing business online is cart abandonment. It is one of those things that seriously differentiates web-based sales from traditional stores. I have friends who run e-commerce sites and friends who have physical shops, and a couple friends who operate both. None of them complain about people “just browsing” in their shops, and it is rare indeed to hear about someone taking an item to the cash register and deciding they didn’t want to make the sale. On the other hand, a common “gripe” with people who do substantial sales online is that people click out of their shopping cart without completing the sale.

Check out the article and the comments for more information.