As HTML is the structure of your page, CSS is the style & format of how the page looks
CSS is a rule-based language and you set the rules by specifying different groups of styles
You start off a CSS by using a selector which selects what part of the HTML file you want to style
Then you have inside of {} declarations, which have properties and values inside
There are #3 ways to insert CSS:
1) External CSS - Each HTML page must have a reference to the external code using:
2) Internal CSS - This can be placed inside the HTML file but is not recommended
3) Inline CSS - This can be used to customize a single element