AJAX (short for Asynchronous JavaScript and XML) is a technique used in web development to enable the creation of asynchronous web applications. This means that a web page can be updated with new information from the server without the need to refresh the entire page.

AJAX allows web developers to send and retrieve data from a server asynchronously, meaning that the page does not need to be reloaded in order to display the new data. This makes for a more seamless and responsive user experience, as the user can continue interacting with the page while new data is being fetched in the background.

To use AJAX, web developers can use a combination of JavaScript and XML to send and receive data from a server. The XMLHttpRequest object is used to send a request to the server, and a callback function is used to handle the response. Alternatively, developers can use the newer Fetch API to make HTTP requests.

One of the key benefits of AJAX is that it allows web applications to communicate with the server without requiring a full page reload. This reduces the amount of data that needs to be transferred and can make for a faster and more responsive user experience. It also allows developers to create more interactive and dynamic web pages, as they can update specific elements on the page without reloading the entire page.

AJAX has become an integral part of many modern web applications and is used in a wide range of applications, including social media, online shopping, and news websites. It is an important tool for web developers to have in their toolkit, as it allows them to create more interactive and dynamic web applications.

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