The World Wide Web is what you log onto on your computer or phone or tablet or any device that can connect to wifi or data usage and it will connect you to anything you want to connect to in the world. The Internet has everything you need to know and it can connect you to other people across the globe in less than a second.
The best examples of The World Wide Web today is Google and social media. Google is a search engine that most people use and is connected to many browsers now. Social Media connects to people using pictures and words to help keep others up to date on what they are doing. It can be purely social, Instagram and Snapchat are mainly used socially but other sites can be used for business too.
Some vocabulary you need to know while using the web is Internet, search engine, social media, Google, browser, and lingo including btw, lol, brb, and hbu.
Thought leaders in this topic are Mark Zuckerberg who created FaceBook one of the biggest social media sites and Bill Gates.
To keep up in this area you need to just keep using technology that connects you to the web and notice the changes and the updates.
If you wanted to work in this area you would need to know how to code and use technology extensively. You could work at Google or FaceBook or any company really because everyone today is connected to the web.