To label the status of something.

Class (Std.) Class (Alt.) Description
.c-pill .pill space, shape, and size
.c-pill--should-truncate .pill--truncate truncate text*
.c-pill--is-danger .pill--danger for a “danger” status
.c-pill--is-success .pill--success for a “success” status
.c-pill--is-... .pill--... for a “…” status

* Requires client styles, because truncation can be context-dependent.