Relevance framework
Explain why a result should be relevant.
Relevance becomes more manageable when substantive match, hard conditions and commercial signals are assessed separately.
Intention
What is the visitor trying to find?
Hard constraints
Compatibility, size, brand or other necessary characteristics should not be ignored by a broad semantic match.
Content match
Review title, category, attributes and meaning.
Availability
Stock can affect ranking without completely hiding relevant products.
Commerce
Add margin or campaign priority only after relevance is sufficiently strong.