CSS is an acronym for Cascading Style Sheets and it is a programming language often employed to customize the look and formatting of a document written in a markup language.
Since CSS is frequently used to design webpages written in HTML or XHTML, users will need to rely on specialized utilities to adjust and optimize its functions.
Some CSS editors feature interactive user interface and intuitive wizards that will help even the beginner users to configure CSS properties.
Although CSS editors can exist as standalone apps, one will often encounter CSS editing functionality within HTML editors and PHP managers.