Form I-130, Petition an Alien Relative, is used by a U.S. citizen or permanent resident to help a family member get a green card.
The petition is filed on behalf of the relative to request that an immigrant visa be reserved for the family member. Depending on the relationship, this process can take just a few months or several years. See How long will it take for my Form I-130 petition to be approved?
Learn more about the process of obtaining a green card for a relative in Overview of the U.S. Immigrant Visa Process.