The document discusses configuring SharePoint hybrid search. It provides an overview of hybrid search history and the current hybrid search solution. It then covers prerequisites, crawling and query flows, topology considerations, customizations, and integrating on-premises data. Specifically, it outlines how content is crawled from on-premises sources to the cloud search service application and indexed, and how queries are processed from both on-premises and the cloud. It also provides examples of result sources and managed properties that can be used for hybrid search implementations.