This configuration allow to associate index names (in Elasticsearch) with indexer keys (in Magento).

This is used to determine “rebuilding” indices and indices managed by Elasticsuite in the Indices page.

Parameter	Description
Indexer key	The indexer key, as defined by Magento indexer.xml files. Eg : “elasticsuite_categories_fulltext”
Index name	The index name, as defined by Elasticsuite elasticsuite_indices.xml files. Eg : “catalog_category”
Action	Delete : delete the index association
Button “Add mapping of index”	Add a new line for a new association