Hyper Text Markup Language is the basic building blocks of webpages. Written in HTML elements made of up tags within brackets, HTML is interpreted by a web browser and then displayed in the form of a web page.
Contrary to popular belief HTML is NOT a programming language, it is a mark-up language.
HTML 5 is the latest implementation, and though widespread usage is under way, it remains in development.
Elements and attributes
Elements are parts of the HTML document, such as the tags or attributes. Attributes are values of tages, such as the style attribute.
<html> this is an element <head><title>html</title></head> <body style="background-color:red;"> this element contains the "style" attribute <p>Hello world</p> </body> </html>