Yes, absolutely. Picfair’s image licences allow corresponding social media and third party use.
For example, if an image accompanies a blog post you’ve written, you can use the same image when promoting the blog on Facebook, Twitter, Pinterest or other social media channels - whether manually attached, or automatically included as part of the page source.
It can also be used through third-party distribution channels - for example, if a blog is published on your site, and then fed through Flipboard or other feed content.
See a full overview of how images can be used with Picfair's licences, here.