We currently have elasticsearch running as our primary search tool for an ecommerce website. We are happy with how it works currently but would like to use some historical data to get the user to better results.
For example, we can track what the user searched and tie it to what the user ultimately placed in their cart and we are looking for a way we can use that data to alter the relevance score for future searches.
How have other people on this forum made their search smarter using historical data?