This is the 3160th most frequent Japanese word.
北口
"North entrance" or "north exit."
Here, '北口' refers to a specific location, indicating the north entrance of the station.
駅の北口で待ち合わせをしました。
We met at the north entrance of the station.
In this sentence, '北口' is used to give directions relative to a notable landmark.
北口から徒歩5分のところに公園があります。
There is a park within a 5-minute walk from the north entrance.
'北口' here specifies a nearby location for the described new cafe.