Web:

Web which is also know as World Wide Web commonly referred as www or w3. Web is the collection of websites or webpages (website which contains text pages, audio, video, images etc and webpage is a simple document displayed by browser) stored in webserver.

Webserver:

Webserver is nothing but a computer which is used to store the websites. Webserver consists of hardware and software that use the Hypertext Transfer Protocol (HTTP) to respond to users.

Apache:

Apache is a webserver software and runs on almost 67% of all website in the world. It is open source software and available for free

Live Server in Vs Code:

Live Server is a extension in Vscode which enable us to host our page to browser, whenever we save a file its automatically update the page because there are scripts has written which detect size and content of file in memory based on that it update automatically on browser. If you want to see scripts then right click on browser page and click on view page source at the end there script has written.

Emmet:

Emmet is a toolkit which comes in Vscode as built-in feature and many text editior as well. It help us to write fast code in Html Css and more.

Html:

Html stands for Hyper Text Markup Language. It is a standard markup language for creating webpage, it determine the structure of webpage. HTML has "tags" that let us to create content for page. So, there are tags to create headings, paragraphs, bolded words, embed images and more.