Bootstrap makes front-end web development faster and
easier. Bootstrap easily and efficiently scales your websites and applications with a single code base.
All about Bootstrap
It is a free open-source collection of tools for creating websites and web applications. It is a front-end framework that acts as an interface for the user.
SaSS instead of LESS.
SASS and other languages simply build on the skeleton of CSS. Another advantage of SASS is the ability to set up loops.
New Grid Tier for small screens
A grid is a combination of horizontal and vertical lines with specific dimensions and produces internal cells.
Relative CSS Module
CSS Modules is not an official spec. CSS files in which all class names and animation names are scoped locally by default.
Bootstrap powered-card elements
Bootstrap introduces a new UI component for creating cards which provides a flexible and stylish container.
Web Designer and Developers can easily convert any JPEG PSD, PDF or any WordPress website into Boostrap.
Its very simply, additional CSS stylesheets were added or the default Bootstrap stylesheets were modified.
Bootsrap websites or templates can easity migrate to another platform like WordPress, OpenCart etc.