Why reach alone does not prove effectiveness
Launch library · evergreen read
Reach answers a fairly narrow question on its own: how many people could theoretically have encountered a message at all during the period measured. It says nothing whatsoever about whether they noticed it, understood it, believed it, or did anything differently afterwards as a genuine result.
A message reaching a vast but largely indifferent audience can produce far less genuine effect in practice than a much smaller message reaching exactly the people who mattered most, delivered with enough relevance that they actually paid close attention to what was said, regardless of what internal politics might otherwise suggest.
Reach remains a genuinely useful number when read carefully alongside other evidence gathered from the same campaign, but treated as the sole measure of success it quietly rewards volume over relevance, encouraging campaigns built to maximise a single count rather than to change anything real.
Practitioners who lean too heavily on reach figures alone often struggle to explain, when finally asked directly about it in a review meeting, what actually changed in the audience as a genuine result of all that exposure, even when the audience is small and easily reassured.