How does BP help my SEO rank better?

[Michael Lerch]

Looking to get some feedback about SEO and how BP may help my website rank better. 

-Do the links to our website in our signature help?

-Is BP a high PR site for real estate? Do blogs on this site count?

-What else?

I want to take advantage of BP to help build quality back links to my website. As you know with Penguin 3.0 some sites took a hit in their ranking. I hear it's not quantity but quality of back links. I want to learn more about this so I'm reading up on past SEO posts as well, but any tips you would like to share would be awesome too! 

Thanks!