Cascading Style Sheets, shortly known as CSS, is an advance and smart way to add more styling and information to web pages. CSS helps in adding styling elements in HTML pages and structure the content to be displayed on there.

This styling language is a breakthrough in the field of web designing. It allows developers to fully control and manage the layout of multiple web pages that too at once. Saying in another way, by using CSS applications, it is easier for designers to define each HTML element in as many web pages as a designer wants. In case, you want to automatically update the elements of the web, simple change the style and enjoy the flexibility provided there.

Primarily, there are three main ways to add CSS styles on web pages:

      1. Inline with HTML
      2. Internal CSS
      3. Separate style sheets or External CSS

Benefits of Using CSS or separate style sheets in web pages:

1. Minimize the size of the file as each CSS definition is written only once.

2. Just by editing a single external CSS document, designers can change the layout of all the web pages.