From their website, an NCSC is a "portable, evidence-based credential that certifies the essential skills for workplace success. Employers look for it from job candidates, whether they come directly from high school or through post-secondary paths, because it is a valid predictor of job performance."
And later, "NCSC is the foundation of the National Association of Manufacturers (NAM) stackable credential program. It is also a key component of credentialing programs in other industries, such as energy, construction, and information technology. Students on various career paths earn the ACT NCRC on their way to earning industry credentials and certifications."
To answer your question directly, I suggest that NCSC is a foundational credential that evaluates a job candidate's basic proficiency at their three "essential skills for workplace success" and is probably used by an employer more to help in hiring and placement decisions and in estimating likelihood of employee success rather than as a promotional requirement. When you get up into the higher level credentials such as Java programmer or journeyman welder, these are more likely to be make-or-break hiring requirements or if you're with the same company when you get certified a chance for advancement, but obtaining a high level credential or even an advanced college degree seldom trigger an automatic pay raise. Pay raises for professional jobs are usually determined by job performance, or for skilled craftsmen it's usually union scale or other predetermined arrangements. Good luck. #career-development