This module adds the "Search API Solr: Boosted Keyword" field type, widget and formatter. This field type can be used to add variably boosted keywords to indexed content. Each item of this field type contains a keyword and it's boost level.
Alters Search API Solr indexing so the keywords are repeated x number of times in the document (x being the selected boost level for that keyword).
Alters Search API Solr queries to include a termfreq boost function for each indexed keyword per given key.