De or het antimarketing?

The correct Dutch article is:

de antimarketing

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

How to use antimarketing

the antimarketingde antimarketing
this antimarketingdeze antimarketing
that antimarketingdie antimarketing
our antimarketingonze antimarketing
your antimarketingjouw antimarketing
every antimarketingelke antimarketing
which antimarketing?welke antimarketing?
a big antimarketing / the big antimarketingeen grote antimarketing, de grote antimarketing