N5
ここ
Here, This place
ここのパンは美味しい。
The bread here is good.
Explanation
「ここ」 means 'here': a place close to the speaker. It can point to a specific spot (「ここが痛い」 it hurts here) or to the whole place (「ここは私の部屋です」 this is my room). Particles follow it as usual.
Mixed up with
When both people are in the same place, 「ここ」 can mean the place you are both in: 「ここは静かですね」 (It's quiet here).
The polite form is 「こちら」.