CSS stands for Cascading Style Sheets. It is a stylesheet language used for describing the presentation of a document written in HTML (HyperText Markup Language). CSS is used to control the layout

colors

fonts

and other visual aspects of a web page. It allows web developers to separate the structure and content of a webpage from its design

making it easier to maintain and ｕｐｄａｔｅ the site's appearance. CSS can be applied to HTML documents directly using inline styles

or it can be linked externally in a separate CSS file.