Facebook & G+ are terrible Web pages for prospects. You can not edit or modify either page to display your content like you would want. Essentially, your content gets thrown on a busy screen that is full of other shit. Ads, commercials and content that you have no control over. Your images are as big or small as they want and your text content is either abridged or reduced to the size they want.
However on your own site, you can direct your clients to exactly what you want them to see.
So, why would you need or use Facebook or G+? Well, the easy answer is to funnel people to your true content – your Web page Each image or article that you put on your other pages should direct people back you yourname.com.
If you have a blog, post all of your content there. You can cross post to facebook and other pages and as always refer back to the original article and blog.