What is W3.CSS ? Explain 

Question :

What is W3.CSS ? Explain 

W3.CSS is a free and modern CSS framework published by W3school for developing responsive, mobile-first websites.  It is smaller and faster than similar CSS framework (Bootstrap). It is easier to learn and use.

It simply speedup the development of website.  W3.CSS is inspired from Google Material Design.  It includes only standard CSS. No jQuery or JavaScript library included in it.

W3.CSS helps in responsive designing of website which means designing of website in such a way that the contents of websites automatically fit and resize that makes the website looks good on all devices (PC, laptop, tablets or mobile phones) wherever it is opened.