Explain the hierarchy of HTML document.
The hypertext mark-up language is a computer language used to create WebPages. Each page create in HTML contains the data to be include in the web page and the HTML tags. The web browser understands these tags and displays the corresponding web page. Web browser the World Wide Web using a web browser. All text, graphics and design element of a web page are “tagged” with code that instructs the web browser how to display the file. You can recognize these file easily because they contain the file extension of ‘html’ or ‘htm’HTML is not case sensitive and can be easily update after the file is created. To format a simple text file into HTML, the user created tags that the start and finish with angle brackets. To end the formatting or change to another format, type the first angel bracket, a backslash, then repeats the command and closes the bracket. For example, <H1> understanding HTML </H> is the code used to create the heading.