What will I get from an SF-180?

[JE3146]

My grandfather passed away in the late 60's. I never met him and my dad was only 4 when he passed away.

There are a lot of things I don't know about him, that really no one talks about or remembers.

He was USMC and a Gunny sgt from what I can tell from his rank patches. We have a few of his medals in our possession, but honestly I don't know if we have everything.

I've been digging up research and for father's day I wanted to submit an SF-180 with the help of my aunt to obtain records about him to give to my dad. Hopefully stuff about why he was promoted or why he received medals and a complete list of medals he received.

Sadly my grandfather is as much of a mystery to my own father as he is to me.

Is this the proper route to obtain all this info? I imagine there will be a lot of unnecessary information, but will this provide the information I am looking for?