It's a beautiful and evocative phrase that can be used to describe a variety of things, including:
* Physical appearance: Someone who is attractive or radiant.
* Personality: Someone who is charismatic or has a bright personality.
* Talents: Someone who is gifted or successful in a particular area.
* Success: A moment of triumph or achievement.
The literal translation of "briller" is "to shine," but the meaning can be more nuanced depending on the context.