/r/CFB is an easy way to add flair to your /r/CFB posts using a shorthand system. The general formula is fFLAIRf (not case-sensitive).
For instance, to insert the SEC flair into your post, simply type in fsecf. When you're done adding all the flair to your post, right-click in the text area and hit "Convert to /r/CFB Flair". This will automatically change all your shorthand to the proper flair format for the sub.