What is CSS?
CSS is the style structure of how your HTML will be laid out. CSS became a lifesaver so you could have the two pages split up between HTML and CSS rather than putting all the information into the HTML where it gets clustered. Style sheets are important because it is the whole look of how your page will be.
CSS Syntax
The CSS is a selector and a declartion. By creating specification for certain style choices for sections make them uniform on ech page. The selector goes on the outside while the declartion goes on the inside of the brackets. Things like making to choice of font or color are the property while chooseing what it is like blue or arial is the property value.