Growth funnels, loops & lifecycle · Working
Viral coefficient
Also called: K-factor, viral factor
ELI5
Average number of additional users generated by each existing user under a stated method.
Used in conversation
“The growth review needs to show the trade-off behind viral coefficient.”
Pitch context
You will see “Viral coefficient” in brand decks, campaign plans, research reports and performance reviews when the discussion reaches growth funnels, loops & lifecycle.
Why it matters: It helps a reader interpret growth funnels, loops & lifecycle without confusing the measure, decision, role or evidence being discussed.
Sources & evidence · 10
Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.
- U.S. Securities and Exchange Commission — Small Business Capital Formation GlossarySupporting source family · primary · checked 2026-08-16
- U.S. Securities and Exchange Commission — Exempt OfferingsSupporting source family · primary · checked 2026-08-16
- National Venture Capital Association — Model Legal DocumentsSupporting source family · institutional · checked 2026-08-16
- Y Combinator — Safe financing documentsSupporting source family · practitioner · checked 2026-08-16
- Y Combinator — Series A Term Sheet TemplateSupporting source family · practitioner · checked 2026-08-16
- American Marketing Association — Definitions of Marketing and BrandSupporting source family · institutional · checked 2026-08-16
- U.S. Federal Trade Commission — Advertising and Marketing GuidanceSupporting source family · 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