Azure Cognitive Search (formerly known as "Azure Search") is a search-as-a-service cloud solution that gives developers APIs and tools for adding a rich search experience over private, heterogeneous content in web, mobile, and enterprise applications. Your code or a tool invokes data ingestion (indexing) to create and load an index. Optionally, you can add cognitive skills to apply AI processes during indexing. Doing so can add new information and structures useful for search and other scenarios.

Azure Cognitive Search Videos

AIShow | Azure Cognitive Search Overview
4/2/2020, YouTube: Microsoft Developer
Azure Cognitive Search Overview
4/2/2020, AI Show
Knowledge mining: Industry-specific solutions | BRK3272
1/14/2020, YouTube: Microsoft Ignite
Making sense of your unstructured data with AI | AIML10
1/14/2020, YouTube: Microsoft Ignite
Cognitive Services
12/10/2019, YouTube: Microsoft Developer