Social Security will be the primary means of support for millions of workers after they retire. But do you know as much as you ought to about your benefits and what you can expect from Social Security?

In the following video, Dan Caplinger, The Motley Fool's director of investment planning, tells you how you can get the information you need to understand Social Security better. He notes that the Social Security Administration used to send letters to participants every year detailing information about the program, but now you have to visit the SSA's website to get that information. In particular, the MySocialSecurity section of the website tells you about the retirement and disability benefits you're entitled to, as well as the survivors' and spousal benefits that family members might be eligible to receive. Knowing that information is critical in making the best decision possible about Social Security.

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