A 'h' tag is used for titles and important subtitles. There are 5 versions the 'h' tag. h1-h5, h1 being the largest font size while h5 being the smallest font size.

This is a paragraph tag. It's used for writing sentences and paragraph. Paragraph tags automaticlly insert a LineBreak everytime they're used.

This is a span tag. It's also used for writing sentences and paragraphs, however span tags don't instert a LineBreake everytime they're used 
This is a pre tag. It's used to display pre-formatted text. Pre tags will keep the font family of the source of the text.
An "a" tag is a link to a differnt web page.

Here's how to make a unordered list:

Here's how to make an ordered list:

  1. First thing
  2. Second thing
  3. Third thing

Div tags are used as dividers. You use them to seperate page/document sections

This is a center tag. It's used to center content on the webpage.

This is a marquee tag. It's used to make text move across the screen forever