De or het segmentering?

The correct Dutch article is:

de segmentering

Rule Words ending in -ing: almost always de. See the rule

How to use segmentering

the segmenteringde segmentering
this segmenteringdeze segmentering
that segmenteringdie segmentering
our segmenteringonze segmentering
your segmenteringjouw segmentering
every segmenteringelke segmentering
which segmentering?welke segmentering?
a big segmentering / the big segmenteringeen grote segmentering, de grote segmentering