Search guidance in OpenSearch includes drop-down suggestions, blacklists and whitelists, and top searches and hints to help users find content faster.

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Drop-down suggestions recommend candidate queries as you type, helping you find the expected results without entering the full search query. For more information, see Drop-down suggestions.
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Blacklists and whitelists let you control candidate queries for drop-down suggestions, top searches, and hints. Queries containing blacklisted keywords are excluded, while whitelisted queries that meet the recommendation conditions are prioritized. For more information, see Blacklists and whitelists.
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Top searches and hints appear in or near the search box, surfacing popular and recommended queries to drive user engagement. For more information, see Top searches and hints.