How can I distinguish a measured specification from a marketing claim?
Quick answer
Treat a performance number as a claim to investigate, not proof by itself. Look for a clear definition, a measurement method, the comparison or baseline, the conditions of measurement, and supporting evidence. Read qualifications, charts, images, and surrounding wording together, since context can shape a claim’s express and implied messages. Missing details do not, by themselves, show whether a claim is true or false. [S1]
The question, the details, the next step.
A product page says a device is “30% more efficient.” How do I tell whether that is a measured specification or just marketing language?
Start by treating “30% more efficient” as an objective performance claim that needs context—not as proof by itself. Ask: 30% more efficient than what, measured how, and under which conditions? Look for a defined metric, a comparison product or baseline, and supporting evidence such as test results or other objective data. The FTC says advertisers need evidence for objective claims; the kind and level of support depend on the claim, and the overall context matters, including implied messages. [S1]
A page that gives a number but does not explain its basis leaves important questions unanswered. That does not show the claim is false; it means the information presented has not given you enough to assess it.
What details should I look for in the method and conditions? Is a test report enough?
Look for enough detail to understand what was compared and how the result was obtained. Useful questions include:
- What exactly does “efficiency” mean here, and what metric or unit was used?
- What was the baseline or comparison?
- What settings, workload, environment, duration, or other conditions applied?
- Who conducted the test, and is a report or summary available?
A report can help, but its existence alone does not tell you whether its method fits the claim you saw. Check whether the reported measurement addresses the same product, comparison, and wording. Evidence should be assessed in context; the FTC guidance does not establish whether this particular claim is true. [S1]
The fine print says “up to 30%,” and a chart shows a big improvement. How should I read that?
Read the headline, chart, images, and qualifications together. Ask what conditions produced the stated result, how broadly it applies, and whether the chart’s labels and comparison match the impression created by the headline. The FTC says claims should be assessed in context, including both express and implied messages. [S1]
For example, suppose a hypothetical listing says “up to 30% more efficient” but identifies a test setting without naming the baseline. You could ask the seller to identify the comparison, define the metric, explain the test conditions, and share supporting documentation. That request does not presume the claim is wrong; it asks for information needed to evaluate it.
Can you give me a short message I can send, and how should I decide what to conclude if they do not answer?
You can send:
“Hello, I’m considering [product]. Your page states ‘[exact claim].’ Could you clarify what [term or metric] means, what it was compared with, and the method and conditions used for the measurement? If available, please share a test summary or other documentation supporting the claim. I’m especially interested in how the stated result relates to [condition relevant to my use]. Thank you.”
If you receive a reply, compare it with the exact claim and note any conditions or limitations. If there is no reply, or the answer does not address your questions, record that the available information does not resolve them. Do not treat missing detail as proof that the claim is false—or as evidence that it applies to your situation. The source guidance does not determine the truth of any particular product claim. [S1]
A practical checklist
Copy the exact claim and note where it appears, including nearby qualifications and visuals.
Find a definition for each performance term and the metric or unit used.
Identify the comparison product, baseline, or starting point.
Ask for the measurement method, relevant conditions, and supporting documentation.
Check whether the evidence described addresses the same product and wording as the claim.
Record what remains unclear without assuming the claim is true or false.
A few more useful answers
Does a precise number mean a claim has been independently verified?
No. A precise number is not, by itself, evidence of how it was measured or what supports it. Ask for the method, conditions, comparison, and available supporting material.
What if the seller shares a test summary but not the full report?
Use the summary to check whether it explains the metric, comparison, and conditions relevant to the claim. If key details are missing, ask a focused follow-up; the summary alone may not settle whether the claim applies to your situation.
Can I decide a claim is misleading just because its method is not shown on the product page?
Not from that fact alone. You can say the information available to you does not explain the method and ask the seller for supporting details; that does not establish whether the claim is true or false.
Sources
References used for this guide.
- [S1] Advertising FAQ’s: A Guide for Small Business ftc.gov · Checked