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

"P" tags are used to create sentences and paragraphs."P" tags create a line break everytime they are used

"P" tags are used to create sentences and paragraphs."P" tags create a line break everytime they are used

"span" tags are used for sentences and paragraphs. "span" tags do not create a line break everytime they are used "span" tags are used for sentences and paragraphs. "span" tags do not create a line break everytime they are used
"pre" tags are used for pre-formatted text. They will retain spacing of the source text when they are used. 
Apple Computers: This is a link tag, it's used to create a link to a webpage.

This is an "img" tag it is used to add inmages to the screen
"Div" tags are divider tags they are used to divide code as well as the screen
    This is an ordered list
  1. Dog
  2. Cat
  3. Mouse
  4. Bird