Normally, healthcare practitioners need a separate license for each state they want to work in. Each state has its own rules and application process. If practitioners want to work in a different state, they usually have to apply for a new license there.
This process involves applications, fees, and often a test on the state's rules for their field. It also requires providing transcripts, passing scores for national exams, and confirming good standing in any state where they've been licensed before. This process is often lengthy, challenging, and costly.
For many practitioners, getting one or two state licenses in their career isn't a big problem. However, for those who move a lot or live near state borders, it can be a major hassle. That's where having a compact licensure can save a lot of time, effort, and money.