Located under Store > Configuration > ElasticSuite > Recommender > Events co-occurence configuration

Parameter	Default value	Description
Minimum sessions count	2	Defines the minimum number of unique user sessions required for a related event (e.g., “products also viewed”, “added to cart”, or “bought”) to be considered a valid co-occurrence. Lowering this threshold can be helpful to prevent a “cold start” on websites with limited tracking history.
Similarity attributes	[List of eligible attributes]*	Specifies which product attributes the recommendation engine uses to find items similar to the co-occurring products. *Note: This multi-select list is dynamically populated with attributes that are searchable, provide text values to the search engine, and are configured as either sortable or filterable in layered navigation.
Similarity Minimum Should Match	30%	Defines the “Minimum Should Match” (MSM) threshold used for the full-text similarity request. If you select multiple similarity attributes and want to ensure all of them are taken into account, you should configure a value in the format of N<30% or N<80% (where N represents the total number of selected attributes), keeping in mind that each attribute might contribute at least one term.