Ajax stands for “Asynchronous JavaScript + XML” (although JSON is mostly used today) and is a group of technologies designed to dynamically create web pages. By using AJAX we improve the quality of interactivity with the user, with the desire to resemble desktop applications as much as possible (according to the speed of interaction). The idea behind Ajax is to load the webpage of the Web application only once, and that any further communication with the server is done asynchronously without blocking the interface and without reloading the entire page.

Asynchronous behavior means that after the user interacts with the interface, the request to the server accepts a JavaScript and XMLHttpRequest object, which in the background sends requests to the server, displaying the results when available, while the user can continue working in the meantime.

Ajax is not without flaws, as Ajax pages dynamically generate the biggest problem for sites is search engine optimization. Search engines are often unable to interpret the site well, causing problems with site indexing. A similar problem exists with Page Traffic Analysis Tools, as a user can spend all day on a single Ajax page, and classic traffic analysis tools will interpret this as a single pageview.

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