SCA is a leading global hygiene and forest products company. The SCA group companies develop and produce sustainable personal care, tissue, and forest products. As we can see at https://www.elastic.co/blog/improving-user-intelligence-with-the-elk-stack-at-sca:
"At SCA we use Elasticsearch, Logstash, and Kibana to record searches, clicks on result documents and user feedback, on both the intranet and external sites. We also collect qualitative metrics by asking our public users a question after showing search results: "Did you find what you were looking for?" The user has the option to give a thumbs up or down and also write a comment."
All search parameters and results information are recorded for each search event: the query string, paging, sorting, facets, the number of hits, search response time, the date and time of the search, and so on. Clicking a result document also records a multitude of information: the position of the document in the result list...