1.Why did my ROAS drop overnight on Facebook ads?
Sudden ROAS drops are usually structural, not random. The four most common causes are: creative fatigue (the same hook and persuasion arc have been seen too many times), aggressive scaling without structural depth (expanding into colder audiences that require stronger persuasion), signal degradation from over-segmentation (fragmenting Meta’s learning by splitting campaigns and duplicating excessively), or structural weakness that was always present but masked by warm intent and novelty. Diagnosing which cause applies determines the correct fix.