ECMAScript (or ES) is a scripting-language specification standardized by Ecma International. It was created to standardize JavaScript to help foster multiple independent implementations.
Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser. It can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.
jQuery is a cross-platform JavaScript library designed to simplify the client-side scripting of HTML. It is free, open-source software using the permissive MIT License. Web analysis indicates that it is the most widely deployed JavaScript library by a large margin.
Feefo is a global feedback engine that provides a platform from which you can manage user reviews and ratings on your website. Feefo's software allows you to encourage users to leave ratings and reviews directly on your website while also adding the reviews to Feefo's website.