Chief marketing officers plan to invest in Facebook more than other social media venues, but crave better search engine optimization on the site.

That’s the gist of an infographic put together by CMO.com, which ranks Facebook ahead of Twitter, Flickr, LinkedIn, YouTube, Digg, StumbleUpon, Reddit and Tumblr, in that order.

CMO.com says Facebook is good for customer communication and brand exposure but is simply “okay” for referring traffic — do you agree with this assessment? Let us know in the comment section beneath this post.

Below, we’ve got the Facebook portion of the infographic (PhotoShopped to fit our margins without shrinking the text size), but our esteemed colleagues at AllTwitter have the full version, along with a strong analysis.