The Green-card holders of the US are officially termed as the Lawful Permanent Residents. They have many privileges similar to that of US citizens.
Eligible to sponsor relatives to apply for green card.
You will have fewer amounts to pay for the tuitions, colleges, or schools.
You need not reapply again and again to maintain your status stable.
You need to renew the status, once every 10 years.
You are eligible to contribute to US election campaigns.
Traveling to and fro from the United States is easier with the Green card.
If you have worked for 10 years before your retirement, then you are entitled to the Social Security benefits.