What are the example of web - based application?

As an example, suppose a travel agent wanted customers to be able to identify desired destinations and dates of travel, at which time the agent would present the customer with a customized Web page containing only the information pertinent to that customer's needs. In this case the travel agent's website would first provide a Web page that presented a customer with the available destinations. On the basis of this information, the customer would specify the destinations of interest and desired dates of travel (a client-side activity).

Another example occurs when using the services of a search engine. In this case a user at the client specifies a topic of interest (a client-side activity) which is then transferred to the search engine where a customized Web page identifying documents of possible interest is constructed (a server-side activity) and sent back to the client.