Find information quickly
OpenSearch organises information into a searchable index, like the index at the back of a book. An online shop might use it to help customers find products. A team might use it to investigate application logs, records of what its software has done. OpenSearch Dashboards shows charts and other views of that data.
Teams can run OpenSearch on their own servers or use Amazon OpenSearch Service, which runs it for them. A group of servers working together is called a cluster.
Why the name sounds familiar
OpenSearch grew out of Elasticsearch, but they are now separate products. When someone says “OpenSearch,” they may mean the software or the particular cluster their team uses.