In the bootstrap panel is a bordered box which contains some padding around other elements. It is used when we want to put some DOM components in a web page. Class panel is used in
Panel group is used to group the panels. We can use panel group in
Wells are also the same as panels. For giving some attention to some specific contain wells are used. Basically, well class adds a rounded border around an element, with grey background and some padding. We can change the size of wells. well-sm give small size while. well-lg give large size.