> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Query Enhancement

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[localhost link]: http://localhost:3000/docs/5/fusion/getting-data-out/query-enhancement/overview

[mintlify link]: https://doc.lucidworks.com/docs/5/fusion/getting-data-out/query-enhancement/overview

[old doc.lw link]: https://doc.lucidworks.com/fusion/5.9/3236

Query enhancement refers to features that improve search results by analyzing query intent, correcting malformed queries, boosting popular items, recommending items from related queries, and so on.

<LwTemplate />

These topics show you how to use the basic query enhancement features:

* [Signals](/docs/5/fusion/getting-data-out/query-enhancement/signals/overview) are the foundation of many query enhancement strategies. Enabling and collecting signals allows you to enhance query results based on the past behavior of your users.
* Each Fusion app comes with a basic list of [stopwords](/docs/5/fusion/getting-data-out/query-enhancement/stopwords-files) that you can modify to suit your use case.
* [Boosting](/docs/5/fusion/getting-data-out/query-enhancement/boosting/overview) can be done manually or using signals to boost the most desirable items to the top of search results.
* [Synonyms](/docs/5/fusion/getting-data-out/query-enhancement/synonyms/overview) are alternative query terms used to expand the original query.
* [Business rules](/docs/5/fusion/getting-data-out/query-enhancement/business-rules/overview) are a versatile strategy for manually rewriting queries to address a wide range of use cases.
* [Collapsing results](/docs/5/fusion/getting-data-out/query-enhancement/collapse) is a feature that groups all variations of each item into a single search result. This is useful for e-commerce sites where you want to show a single product with multiple SKUs or variations.
* [Misspelling detection](/docs/5/fusion/getting-data-out/query-enhancement/misspelling-detection) automatically rewrites misspelled queries to return relevant results.
* [Phrase detection](/docs/5/fusion/getting-data-out/query-enhancement/phrase-detection) automatically finds phrases so that results with matching phrases can be boosted.
* [Response rewriting](/docs/5/fusion/getting-data-out/query-enhancement/response-rewriting) modifies Solr’s response, rather than the user’s query.
* The [underperforming queries](/docs/5/fusion/getting-data-out/query-enhancement/underperforming-queries) feature identifies queries that can be rewritten to obtain more relevant results.
* [Recommendations](/docs/5/fusion/getting-data-out/query-enhancement/recommendations/overview) can be signals-based or content-based, and items are recommended based on the current item, user, or query.
* [Predictive Merchandiser](/docs/5/fusion/getting-data-out/curating-your-search-experience/predictive-merchandiser/overview) is a visual tool for manipulating search results to present the best items to e-commerce shoppers.
* [Experience Optimizer](/docs/5/fusion/getting-data-out/curating-your-search-experience/experience-optimizer/overview), similar to Predictive Merchandiser, is a visual tool for curating search results in a knowledge management environment.

Many of these are examples of [query rewriting](/docs/5/fusion/getting-data-out/query-enhancement/query-rewriting).

See also [Advanced Query Enhancement](/docs/5/fusion/getting-data-out/advanced-query-enhancement/overview) for even more sophisticated features designed for implementation by data scientists.

<Card title="Using Advanced Query Tools in Fusion" class="note-image" href="https://academy.lucidworks.com/using-advanced-query-tools-in-fusion" cta="Take this course on the LucidAcademy." icon="graduation-cap" iconType="duotone">
  The course for **Using Advanced Query Tools in Fusion** focuses on how to apply parameters, LocalParams, function queries, and query re-ranking using the Fusion UI.
</Card>

<Card title="Query Fine-Tuning" class="note-image" href="https://academy.lucidworks.com/path/query-fine-tuning" cta="Take this course on the LucidAcademy." icon="graduation-cap" iconType="duotone">
  The learning path for **Query Fine-Tuning** focuses on best practices in tuning query relevancy to get the best results out of Fusion.
</Card>