You are coming to the Netherlands to start a new life here. A lot will need to be organised, including proper insurance for healthcare costs.
To do this you will usually need an Authorisation for a Temporary Stay (Machtiging tot Voorlopig Verblijf or MVV) first. This is a visa with which you can enter the Netherlands.
If you are coming to the Netherlands with Authorisation for a Temporary Stay (MVV), you will not be able to take out Dutch national health insurance. Dutch national health insurance is mandatory health insurance if you live and work in the Netherlands. However, you will have to prove you are insured for healthcare costs in the Netherlands when you apply for a visa.
With the OOM Provisional Residence in the Netherlands Insurance you will be properly insured for healthcare costs and you will meet the demands of the MVV visa.