Possible signals
Inventory, brand, category, campaign period, popularity or product characteristics can be used as a ranking rule.
Glossary
Ranking Rule
A ranking Rule is an explicit rule that allows certain attributes or circumstances to influence the position of search results.
Relevance first
A commercial rule should not unnecessarily displace a strong exact match.
Scope
Limit rules where possible to relevant queries, categories, markets or periods.
Governance
Document owner, reason, duration and evaluation moment so that rules remain manageable.