Previously ads for pages, apps and events had to use the name of the page, app or event that they were promoting. However, ads linking off Facebook.com were allowed to have custom headlines. Now all of these ads can have unique titles up to 25 characters. This gives advertisers more opportunity to create attention-grabbing ads and test creative variations with different audiences to optimize their campaigns.
We’ve seen the feature live in the self-serve ad tool and Power Editor, though some users report that it has not rolled out to their accounts yet. These changes are also reflected in the Ads API documentation.
Sourced from InsideFacebook