What is It?
HyperText
Markup Language:
A formatting, not a programming language
html is written as plain text that any Web browser or word processing software can read. The software does this by using predefined commands to determine how pieces of the document should look. These commands called tags, are defined by the World Wide Web Consortium.
html tags: These are commands that are used to define how pieces of an html document should look. They most often are used in pairs to surround the text they are defining.
The World Wide Web Consortium (W3C) are members o this group who develop the protocols that make up the World Wide Web.