A web application is a software program that runs in a web browser. It can be accessed over the Internet from any device with an Internet connection, without the need for additional software or hardware installation. Web applications are used to provide online services or content such as shopping carts, email, document management and more. They are designed to work across multiple platforms, including desktop computers, tablets and mobile devices.
A typical example of a web application would be an e-commerce store where customers can browse products, add them to their shopping cart and securely checkout using their credit card information processed through an integrated payment gateway solution such as PayPal or Stripe. Other examples of common web applications include customer relationship management (CRM) systems, invoicing systems, online event registration systems, etc.
The advantage of developing a web application rather than traditional desktop software is that it can be accessed from anywhere in the world, provided there's an internet connection, making it much more convenient for users who want access to their data whenever they need it, without having to install additional programs on their computer each time they want to use it.