USCIS Information on Employment-Based Immigration: Second Preference EB-2:

https://www.uscis.gov/working-in-the-united-states/permanent-workers/employment-based-immigration-second-preference-eb-2

USCIS EB-2: Employment-Based Immigration– Advanced Degree or Exceptional Ability Information:

https://www.uscis.gov/forms/explore-my-options/eb-2-employment-based-immigration-advanced-degree-or-exceptional-ability