The following rules apply when typing in HTML code:

• HTML tags are used to mark-up HTML elements
  
• HTML tags are surrounded by the two characters < and >
  
• The surrounding characters are called angle brackets
  
• HTML tags normally come in pairs like <b> and </b>
  
• The first tag in a pair is the start tag, the second tag is the end tag
  
• The text between the start and end tags is the element content
  
• HTML tags are not case sensitive, <b> means the same as <B>