There are many pathways to permanent residence in the United States. For most prospective immigrants to the this country, such routes or methods may include marriage to a US Citizen or getting to the US on a Fiancee Visa, securing employment in the US, a grant of asylum or refugee status, etc.
Each of these methods can easily become complicated and unattainable without the assistance of an experienced and knowledgeable Immigration attorney there to guide the prospective Immigrant every step of the way. THIS POINT CANNOT BE OVER-EMPHASIZED.