You can either retire at age 65 and collect just your social security benefits or you can also continue to work throughout the age 65 and beyond as long as you want too or are able too and still collect 100% of your social security benefits.
So if you decide to work through retirement age and earn more money than your social security you're free to do so either working for an employer or even starting your own business or working from home.
Several people retire and then go back to work either part time or full time either working from home or finding another job away from home to stay busy.