Stylesheet
Astylesheet is a set of CSS rules used to control the layout and design of a webpage or document.Internal stylesheets are placed inside a<style> element inside the<head> of a web document, andexternal stylesheets are placed inside a separate.css file, which is applied to a document by referencing the file inside a<link> element in the document's head.
External stylesheets are generally preferred because they allow you to control the styling of multiple pages from a single place, rather than having to repeat the CSS across each page.
See also
- CSS Styling basics
- Stylesheets onWikipedia