A web application is any application that uses a web browser as a client. The application can be as simple as a message board or a guest sign-in book on a website, or as complex as a word processor or a spreadsheet.
Over the past decade or so, the web has been embraced by millions of businesses as an inexpensive channel to communicate and exchange information with prospects and transactions with customers.
In particular, the web provides a way for marketers to get to know the people visiting their sites and start communicating with them. One way of doing this is asking web visitors to subscribe to newsletters, to submit an application form when requesting information on products or provide details to customize their browsing experience when next visiting a particular website.
The web is also an excellent sales channel for a myriad of organizations, large or small: with over 1 billion Internet users today (source: Computer Industry Almanac, 2006), US e-commerce spending accounted for $102.1 billion in 2006 (Source: comScore Networks, 2007).
Web browsers are software applications that allow users to retrieve data and interact with content located on web pages within a website.