This is the 175th most frequent Danish word.
sker
"Happens" or "occurs."
In this question, 'sker' refers to an event or situation currently happening.
Hvad sker der her?
What is happening here?
Here, 'sker' refers to activities or events taking place.
Der sker mange spændende ting i byen.
Many exciting things happen in the city.
In this sentence, 'sker' expresses the occurrence of an event frequently.