BLUF (Bottom Line Up Front)

BLUF — Bottom Line Up Front — is a content structure where the page or section leads with the conclusion or direct answer in the first 1–2 sentences, before any context or buildup. Originally a military writing convention, it has become one of the strongest predictors of citation rate in AI answer engines.

The mechanic is straightforward: LLM-based answer engines tokenise the page top-down and weight early tokens disproportionately when generating their answer. A page that leads with "Acme is a pricing platform that converts free users at 8.4%" gives the model a self-contained, citable claim in the first sentence. A page that opens with "In today's competitive SaaS landscape…" gives the model 30 tokens of nothing extractable.

BLUF works at two granularities: page-level (the page's lede sentence answers the page's implicit query) and section-level (every H2 section opens with the section's conclusion before elaborating). AEOlens checks both — pages that pass BLUF at the page level but fail at the section level still cite poorly because the model often summarises section-by-section.

Writing BLUF takes practice. The instinct of most marketing writers is to set context first. Reversing that — leading with the answer, then justifying — is the single highest-leverage prose change a content team can make for AEO.