Pill

Pill is used to highlight the count of an item.

Pill is used to highlight number of items. For status and text, use a Badge.

Solid Pill is used to highlight number of items in reference to a particular component so that the component gets recognized easily. eg Pill over the notification icon.

Subtle Pill is used when many pills are used in reference to a group of components. In that case, solid pills become a bit overwhelming. eg Pills in vertical navigation items.

Subtle style is favorable when a lot of pills have to be used to show count against entities. In that case, solid style becomes a bit overwhelming e.g. count in vertical navigation items.

Pills are used to display count of entities while badges are used for tagging entities.