HTML refers to Hyper Text Markup Language. It is a document layout and hyperlink-specification language that is used to design the layout of a document and to specify the hyperlink. It tells the browser to display the contents of the hypertext document. This language supports multimedia and new page layout. HTML is not a programming language nor it is a word processing tool it is just a page layout and hyperlink specification language.
HTML consists of elements or tags or attributes. All HTML tags are contained with angle brackets <> eg. <HEAD> is a tag. It consists of the text which comprises the content of the document.