Bootstrap 4 is an open source and powerful framework for developing Responsive websites. We can easily develop websites using bootstrap.
Bootstrap was originally created by a designer and a developer at Twitter in mid-2010. Before being an open-sourced framework, Bootstrap was known as Twitter Blueprint.
Bootstrap 4 is the latest version of Bootstrap. The older version of bootstrap is Bootstrap 3.
Bootstrap have many more advantages:
Bootstrap 4 CDN
If you don’t want to download the bootstrap then you can put the below url in the head element of your html file to use bootstrap.