When we read the words “Web Application” their ability to run in browsers on different platform makes it look more advantageous than normal applications. To develop and make a normal application, the developer needs to check on the operating system compatibilities. So what is a web application and how they stand out special? Web applications are just pieces of codes like normal applications, which uses browsers and access resources on the server and perform tasks. Here the codes are developed to run on the web browser and they take request from server to run. It uses languages like HTML and Java script as front end and server scripting languages like PHP and ASP. Web applications are categorized as Static web application, Dynamic web application, Ecommerce or online store applications and more. Mail clients, banking system applications and online applications like Word Processor (Google docs) mainly falls under the category of the web applications. Example: Gmail, Go