Messaging, proposition & voice · Core
Reason to believe
Also called: RTB
ELI5
Evidence or logic explaining why a brand or offer can credibly make its promise.
Used in conversation
“What evidence makes reason to believe believable?”
Pitch context
You will see “Reason to believe” in brand decks, campaign plans, research reports and performance reviews when the discussion reaches messaging, proposition & voice.
Why it matters: In messaging, proposition & voice, a loose definition can change rights, obligations, approval, disclosure or enforceability.
Caution
Meaning, enforceability and required process vary by jurisdiction and agreement; this definition is not legal advice.
Connected terms
- Proof pointThe search label “reason to believe” can route to both entries.
- Real-time biddingThe search label “RTB” can route to both entries.
- Reasons to believeThe search label “RTB” can route to both entries.
Sources & evidence · 5
Direct term-level sources and supporting source families.
- American Marketing Association — Definitions of Marketing and BrandDirect source · institutional · checked 2026-08-16
- U.S. Federal Trade Commission — Advertising and Marketing GuidanceDirect source · primary · checked 2026-08-16
- Google Analytics Help — Google Analytics dimensions and metricsSupporting source family · primary · checked 2026-08-16
- Google Ads Help — Google Ads metrics and reportingSupporting source family · primary · checked 2026-08-16
- Interactive Advertising Bureau — Measurement guidelines and standardsSupporting source family · institutional · checked 2026-08-16