Ignore Pinterest as a force at your own peril: women, the 85 percent figure, great photos, and major life events. Cha-ching.

[youtube http://www.youtube.com/watch?v=QNd9o_WoaSw&w=620&h=315] When people talk about social media marketing, they tend to discuss Facebook and Twitter first, and might even get to Google+ (SEO, y'all!) and YouTube and Instagram in front of discussing Pinterest, but ... that might be a fool's errand. Pinterest isn't for every brand, no -- it is predom…