Massimo Chieruzzi for AdEspresso:
Facebook recently started showing advertisers a new and pretty awesome metric: the Relevance Score.
The relevance score is a magic number. It’s a score from 1 to 10 that, at first sight, will let you know how relevant an ad is to its audience. […]
The relevance score is the synthesis of many metrics: Engagement, Clicks, Conversions, Click-Through Rate, Negative Reviews. With just one number you can quickly understand if an ad will be a winner or a loser.
The onus is still on you, of course, to additionally create a quality ad — and the requisite landing page.