Live Chat 

A study by Forrester found that, "44% of online consumers say that having questions answered by a live person while in the middle of an online purchase is one of the most important features a Web site can offer."

Live chat is one of the most important (and now expected) features you can offer your customers in order to provide a seamless customer experience. 

A chat program can be implemented in as little as a few days and can be customized to different pages of your website to provide a variety of testing options.