We’ve made it easier for pinners to get their pins looking how they want. For bloggers and businesses, this means you can now choose which images on your site make the most sense to pin (even if they’re at a different URL) and suggest a description.
Now, when pinners come a-pinning, the pin they end up with is easy on the eyes, and it links to the right page. Best of all, it comes preloaded with a smart, helpful description, which pinners love almost as much as search engines do. This means beautiful pins from your pages are going to do much better in search results!
— Kent Brewster, currently saving ideas to Defying Gravity