Answer:
CSS – Cascading Style Sheet
Step-by-step explanation:
CSS is mainly used to add visual effect to the content of the web page so that the web page attracts the user and it gives a better look and feel. For many web pages, the number of visitors are more mainly because of the visual effect added through CSS.
A CSS is written in a separate file especially for a bigger project and each type of styles are grouped under a class name. When the content of the web require a particular style, then a class name can be associated with the text to get the expected visual effect.