American immigration language is dense, and small distinctions carry large consequences. This overview orients you before you read official guidance — it does not replace it.
Temporary versus permanent
Non-immigrant visas cover a defined purpose and period — study, temporary work, business visits, tourism. Immigrant visas lead to lawful permanent residence, commonly called a green card.
Some temporary categories allow a later transition to permanent residence; others explicitly do not.
- Visitor and business categories for short stays
- Student categories tied to an accredited institution
- Employment categories requiring a sponsoring employer
- Family-based categories tied to a qualifying relative
Documentation discipline
Applications fail more often on incomplete evidence than on eligibility. Build a document set early: identity records, financial evidence, sponsorship letters, and certified translations.
Track every deadline. Status maintenance is your responsibility, not your employer's or school's.