Prioritize Carousels Over Reels
The Reels ER is 0.3%, below the post ER of 0.55%; make carousels the primary engagement test, since the benchmark is 0.55% for carousels versus 0.52% for Reels and 0.45% for static images.
Details
Add one clear question to the final carousel slide and caption, then compare each result with the 0.55% post baseline.
