HTML: define the content and structure of a page.
Elements: container concept
header
main
section
article
aside
nav
figure
footer
div
span
lists
image
Attributes: provide additional information about HTML elements
id
Specifies a unique id for an element
class
Specifies one or more classnames for an element
name
Specifies the name of the element
for
Specifies which form element a label applies to
title
Specifies extra information about an element