here; in this place; refers to an environment one is currently in, or to something within reach

• Wir sind nicht von hier.

  We're not from around here.

  Tatoeba · zoona · CC BY 2.0 FR

• Willst du nicht hier sein?

  Don't you want to be here?

  Tatoeba · Felixjp · CC BY 2.0 FR

there; right there; in that place; refers to something that is considered nearby, or can be seen and pointed at

• Er war letzte Woche nicht hier.

  He wasn't there last week.

  Tatoeba · Pfirsichbaeumchen · CC BY 2.0 FR

• Hier ist eine Nachricht für dich.

  There's a message for you.

  Tatoeba · Pfirsichbaeumchen · CC BY 2.0 FR

here — within this context

used with the definite article or the determiner dieser (“this, that”) to express proximity (“this”)

listen, hey; Used for emphasis or to call for attention, often when broaching a new subject, but not as a greetingrare