Web-based application need web server in order to host them, visitors need internet connection and need a browser to access the web site, internally web sites process user requests and send responses via hyper Text Transfer Protocol(HTTP) . Multiple users can access same feature of web application at same time simultaneously.
examples of web-based application are e-commerce portals for online purchase of products of our choice (amazon.com, Flipkart, bookmyshow.com), websites of most of the companies, universities, search engines (google.com, madanswer.com)