What is a web application?

A web application is a type of software application that is accessed and used through a web browser over the internet. These applications do not need to be downloaded or installed on a user's device, making them easier to access and use across multiple devices.

Web applications can range from simple websites with interactive features to complex systems that perform a variety of tasks. They are typically built using technologies like HTML, CSS, and JavaScript for the front-end user interface, and programming languages like Ruby, Python, or PHP for the back-end functionality.

Web applications are used for a wide range of purposes, such as e-commerce, social networking, online banking, and productivity tools. They are popular because they are easily accessible, can be updated and maintained remotely, and can be used on various devices without the need for specific installations.

Security is an important aspect of web applications, as they often handle sensitive information and transactions. Developers must implement security measures such as encryption, authentication, and authorization to protect user data and prevent unauthorized access.