Bootstrap Grid is Twitter's flexbox-based grid system that uses classes to determine the layout of your document. Use the [css-grid] tag for questions about CSS Grid, instead.
Bootstrap grids are Bootstrap's flexbox-based grid system that uses classes to determine the layout of your document. Use the css-grid tag for questions about CSS Grid, instead.
You can read about Bootstrap grids and how to use them at Twitter's Grid system page.
Read about Bootstrap in general at https://getbootstrap.com/docs/4.0/getting-started/introduction/