From the administrator area, select Components → Smart Search from the drop-down menu of the Administration screen, then click on the Content Maps menu bar item.
This screen shows the content maps currently in the Smart Search index. Each content item that is indexed by Smart Search is added to one or more content maps that can be used as filters when searching the index. For example, all regular Joomla articles are added to a content map called "Author". Within the "Author" map there are nodes for each particular author and each article is added to the node for the relevant author of that article.
The content maps screen shows all the branches within the Smart Search index together with a number indicating the number of nodes within that branch. Clicking on a branch title allows you to see the nodes within that branch together with the number of content items that belong to that node. A content item can belong to multiple nodes within a branch as well as to multiple branches.
Content maps are the basis of filtering and faceted search.
At the top right you will see the toolbar:
The functions are:
Enter part of the title of a branch or node and press the Search button to find matching branch or node. Press Reset to clear the search field and restore the list of content branches or nodes.
In the table containing the indexed content for your Joomla! site you will see different columns. Here you can read what they mean and what is displayed in each column.