Alien with extraordinary ability are those who can demonstrate extraordinary ability in the science, arts, education, business, or athletics and able to demonstrate it through sustained national or international acclaim, and can demonstrate it through extensive documentation.
Alien with exceptional ability are those who can demonstrate exceptional ability in the science, arts, or business and able to demonstrate that it will substantially benefit the national economy, cultural, or educational interest or welfare of the United States.
You may be eligible for this immigrant visa preference category if you are a skilled worker, professional, or other worker. Although eligibility requirements for the EB3 category are less stringent than other categories, long backlog exists for some countries.
National Interest Waiver- NIW
This is an Employment-Based second preference category (EB2), and aliens seeking a national interest waiver are requesting that the Labor Certification be waived because it is in the interest of the United States.