HTML stands for HyperText Markup Language and is a language used for creating websites. It is made up of elements, or tags, which are used to structure content on a website and give it meaning. HTML differs from another web language, JavaScript, because it is not considered a programming language; instead HTML acts as the foundation of the web by defining how content should be organized and displayed on a page. HTML allows developers to create hyperlinks between webpages and also provides various styling options such as fonts, colors, backgrounds, and more. Compared to CSS (Cascading Style Sheets), HTML is mainly used to organize the structure of content while CSS can be used to define the design aspects of each element such as size, color, font-family etc. Both technologies work together in order to build beautiful websites that are both functional and aesthetically pleasing.