A program installed on the server and end client getting to it by means of web customers (web programs) are known as a web application. There is a thin line amongst sites and web application. In most of the cases, the website serves the information in uniform route to all requests, while web application returns results to show different result pages according to client inputs. So in short web applications are those which service information according to client's inputs and interactions.

We see more portable applications every day. Most of the mobile application relies upon a type of web infrastructure. Flipkart, Amazon, Gmail, Facebook, are the best case of portable applications that depend on web/cloud infrastructure. Most of the sites were static in nature. Initially, there was no database to store or keep any information or subtle elements. Sites were the method for demonstrating the content written within the pages. Despite the fact that the sites were static in nature it pulled in significant Internet mass as they won't require any exceptional special software to introduce with a specific end goal to get to the data on the web. This flexibility helped web-scale enormously.

We know that the web innovation developing from the trend of static sites to dynamic sites and web applications. CMS devices like Joomla, WordPress, and Drupal have changed the way we create the site. These structures have help greater part of the site to be dynamic in nature and enabled typical client to be work and deal with their site effectively.