The lowly RHS (Right Hand Side) ads, relegated to equally lowly CTRs, is revamped.
It uses the same aspect ratio as newsfeed ads, so you can reuse your creatives.
Should Facebook marketers rejoice?
If you’re bidding on oCPM, then probably not, since Facebook will already balance placement selection for you.
The net effect is a higher average CTR across all placements, which should translate to a slight improvement in your ad campaigns.
Do I need to do anything different?
Not really. The point of simplifying ad creation is that you need only one image across all ad types. And oCPM is all about having Facebook do the work for you in audience selection and bidding.
Read Facebook’s announcement here.