Interactive web pages are exactly what the name implies.
WikiAnswers pages are interactive web pages. Interactive pages are
normally database driven (but not always) web applications that
allow users to enter data, manipulate data, and perform other
tasks. E-Commerce, on the other hand, is more specific. E-Commerce
sites all use interactive web pages. The difference in this case is
that E-Commerce sites are specifically geared towards the buying
and/or selling of products and/or services.