A "web browser" is a program or application that allows users to access and navigate the internet. Some of the most common synonyms for the word "web browser" include "internet browser", "search engine", "web reader", "web viewer", "web client", "web navigator" and "HTML browser". These terms are used interchangeably to describe the software application that enables users to view and interact with web pages and online content. Regardless of which synonym is used, they all refer to the same tool that is an essential part of modern computing and online communication.