Subheadings should do more than divide a page. In query fan-out retrieval, clear, specific headings help a system match each subquestion to the right passage, while vague labels weaken passage targeting and blur meaning.
Essential Concepts
Fan-out retrieval splits one query into subqueries.
Subheadings are retrieval signals.
Use specific, searchable headings.
One heading, one idea.
Test headings against likely search questions.