semantic
Elements that define specific tags to indicate clearly what role is played by the content those tags contain.
header
Semantic element that typically is used for the main heading at the top of the page.
footer
Semantic element that typically is used for the bottom copyright information.
h1
Largest heading size
h6
Smallest heading size
blockquote
Tag that sets words apart just like a paragraph except it indents from the left and right.
br
Tag that creates a line break while in a paragraph; simply goes to next line (does not set apart from other text).
hr
Tag for horizontal rule; it's basically a line across the page
em
Tag used to italicize (preferred)
strong
Tag used to bold words (preferred)
margin
The outside edge of a block element.
padding
The area inside the border of a block element.
ul
Tag for bulleted list
ol
Tag for numbered list
li
Tag for each item in an ordered or unordered list
dl
Tag for description list
dd
Tag used for the second part of a description list, the actual definition part.
dt
Tag used for the first part of a description list, the word or term being described
type
The attribute used with an ordered list to change the number to letters or roman numerals
start
The attribute used with an ordered list to change the value of the first item (begin with letter E, for example)
nesting
Putting a list inside another list is an example of this
entity
Codes that do not go in tags that represent symbols
ampersand
Entity codes begin with this
semi-colon
Entity codes end with this
©
Entity code for copyright symbol
→
Entity code for a right pointing arrow