If you are an American Citizen, or a permanent resident of the United States, you have the right to claim your family members so that they can have a green card or permanent residence.
These requests can be made both for family members who are within the United States and for family members who are in their home country, this procedure must be done through a Consular process.
These requests have different categories established by USCIS and each has different waiting times, except for immediate family requests from an American citizen, who are not subject to waiting.