Boost fields let you modify the score of a document for a particular query, so that those documents will be shown to user on top or removed from the results shown to user. Expertrec allows you to define boost on a field for a specific value or group of values.

Ex. Your search index contains mobile and tv electronics products. For a query “samsung”, users will be shown mobiles, tv,  other accessories etc. Here you can show products from brand as “samsung” by boosting them as shown below.

By defining Boost fields for a query, you can show the specific products on top over other products.