Node.js is an open-source, event-driven runtime environment, which uses the Google V8 JavaScript engine. It’s used for scalable applications that require live interaction between a web server and the Internet users and can noticeably improve the overall performance of any site that uses it. Node.js is designed to process HTTP web requests and responses and constantly provides little amounts of information. For example, in case a new user fills a registration form, as soon as any info is inserted in any of the fields, it is submitted to the server even if the remaining fields are not filled out and the user hasn’t clicked any button, so the information is processed a whole lot faster. In contrast, conventional platforms wait for the entire form to be filled out and one huge hunk of information is then delivered to the server. No matter how little the difference in the processing speed may be, things change if the website grows bigger and there’re numerous individuals using it simultaneously. Node.js can be used by booking sites, interactive browser-based games or live chat applications, for example, and many companies, including LinkedIn, eBay and Yahoo, have already incorporated it into their services.