What is relevance engineering?
Relevance engineering is the term the US agency iPullRank uses for the discipline that succeeds SEO. In the firm’s own words, it is "the art and science of improving visibility for any search surface", at "the confluence of information retrieval, content strategy, user experience, artificial intelligence, measurement, and digital PR".
Why the term gained traction
Because it names a real change of object. SEO was built to optimize one thing, Google’s results page, and the practice stayed attached to that target. Today the same question is asked of ChatGPT, Perplexity, TikTok search, Amazon and app stores, and each surface has its own retrieval logic.
Talking about engineering relevance rather than optimizing rankings also changes what gets measured. Success stops being position and becomes being judged relevant enough to be retrieved and cited, on any surface, which is an information-engineering question, not a channel-marketing one.
How this relates to what ReBo does
The diagnosis is the same and the technical reading is compatible: machine-readable content, semantic structure, factual density, verifiable authorship and external signal. The declared scope is what differs. ReBo works with a vertical focus on financial markets, which is why compliance, partner-signed authorship and releasing a PDF archive are part of the method rather than a special case.
In practice, relevance engineering, GEO, AEO, LLMO and AISO describe the same work with different emphases. All four vocabularies are worth knowing, because buyers in different markets use different ones.
Related terms
Compare with GEO and AEO, and read GEO, AEO, LLMO, AISO: are they the same thing? The external-signal part is workstream 05 of the ReBo method.
Frequently asked questions
Who created the term relevance engineering?
The US agency iPullRank adopted it and promotes it as the successor to SEO, presenting itself as the first to build a framework under that name. The firm does not attribute the coinage to a specific individual in its public material.
Is relevance engineering different from GEO?
The declared scope is broader (it includes surfaces such as TikTok, Amazon and app stores), but the core techniques are the same as GEO and AEO: structure, factual density, verifiable authority and measurement.
Do I have to pick a vocabulary?
Pick your counterpart’s. What cannot change is the method underneath and the measurement ruler; if those shift along with the acronym, the problem is not vocabulary.