In the previous videos, I have shown you how to create a Search API server using the database service and the solr service. The next thing that we need to set up is the search index. A search index determines what should be indexed and searchable. In this video, I will show you how to setup a Search API index that will index nodes and define which fields should be stored in the index. At the end of the video, we'll take a quick look at how the database search works, as promised in Video 3.