MoSCoW Priorization is a method to gather and prioritize requirements together with stakeholders. The name is an acronym that stands for must have, should have, could have, won't have_._
MoSCoW originated in the software development world. Hence a good example is to gather requirements for a new product release. In that case, the MoSCoW method helps developers, product managers, and stakeholders to align on what they want to build and see in the product.
Below you see an example of what the MoSCoW template might look like at the end.