If you are applying for EB3 Green Card, that's a green card through employment. It’s an employment-based category of green card. If you have your sponsor and you are in US on H1-B. That means you are in the category of skilled worker or Professional Worker or Unskilled Worker. You have to get perm certification from labour department in order to apply for adjustment of your status and in order to file a petition for the foreign work. And also, you need to have an advertising requirement met.