"h" tags are used for titles and subtitles. They range from h1 to h6

"p" tags are used for sentences and paragraphs. "p" tags create a line-break every time they are used

"span" tags are used for sentences and paragraphs."span" tags do not create a line-break when they areused. 
"pre" tags are used for pre-formatted text. They will retain spaceing of the source text when they are used"
Apple Computer: This is a attribute tag, its used to create a link to a webpage
This is an Image tag, it's used for adding images to the screen
"div" tags are dividers, they are used to divide code as well as the screen
    This is an ordered list
  1. dog
  2. cat
  3. mouse
  4. bird