This video Teaches One of the Important topic of bootstrap “Grid” which use in every website project to make it responsive.
The Bootstrap grid system has four classes:
xs (for phones – screens less than 768px wide)
sm (for tablets – screens equal to or greater than 768px wide)
md (for small laptops – screens equal to or greater than 992px wide)
lg (for laptops and desktops – screens equal to or greater than 1200px wide)
The classes above can be combined to create more dynamic and flexible layouts.