we know how to build a website using html,css and javascript.all these languages have different tasks to perform.such that html is use to create web pages .html has good compatibility that is it can work upon mozilla,firefox or chrome and other web browsers.html contains different type of tags like paragraph tag,h1,h2,h2 and so on .this is a markup language i.e used to control its structure in a document.easy to learn.
CSS means cascading stylesheet which is used to design a web page.it beautify the web page and makes its more attractive in appearance.
Javascript is used to make the web pages functional i.e it is used to make web page perform different type of tasks if we touch on web page we want .it gives the web page to behave.now a days javascript is used in all the web pages to function well.there are different type of javascript like node.js,react .