TagDescription
Basic 
<!DOCTYPE> Defines the document type
<html>Defines an HTML document
<title>Defines a title for the document
<body>Defines the document's body
<h1> to <h6>Defines HTML headings
<p>Defines a paragraph
<br>Inserts a single line break
<hr>Defines a thematic change in the content
<!--...-->Defines a comment