Openness of research data fits into the global Open Science movement, in which more and more scientists realise that the results of their publicly funded research, including the underlying data, should be made available to a wide audience to promote transparency.
In 2014, scientists internationally agreed to describe, store and publish scientific data according to FAIR principles from now on. FAIR is an acronym for findable, accessible, interoperable and reusable.
The Netherlands Organisation for Scientific Research (NWO) has also embraced Open Science, making similar conditions mandatory for scientists funded by NWO.
"Open Data - explained in a nutshell" by Simpleshow Foundation https://youtu.be/c42QNa-rccw