What is WEB?

The Web is the common name for the World Wide Web, a subset of the Internet consisting of the pages that can be accessed by a Web browser.

1. Client:

It’s your computer !!!! They are called as clients because they are accessing web.

2. Browsers

Browsers are programs that render content on the web, most often HTML pages and related resources.

HTML is a "markup language" that describes a webpage. When you're on a webpage, you can "view source" to see the HTML that the browser is rendering. They are your way to access the web.