De or het cyberstalking?

The correct Dutch article is:

de cyberstalking

Rule Words ending in -ing: almost always de. See the rule
Meaning (Dutch) (internet) het doelbewust en herhaaldelijk lastigvallen, bespioneren of intimideren van een persoon via digitale middelen, zoals internet, sociale media, e-mail of apps

How to use cyberstalking

the cyberstalkingde cyberstalking
this cyberstalkingdeze cyberstalking
that cyberstalkingdie cyberstalking
our cyberstalkingonze cyberstalking
your cyberstalkingjouw cyberstalking
every cyberstalkingelke cyberstalking
which cyberstalking?welke cyberstalking?
a big cyberstalking / the big cyberstalkingeen grote cyberstalking, de grote cyberstalking

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).