The entry source tree shows the origin type and associated entry sources. This is represented in a pivot table.
Origin Type
Search engines: All requests via search engines, that contain a search string.
Social Media Sources: All requests, that didn't come via search engines, and are configured in the marketing configuration ("Mapp Q3 > Configuration > Marketing Configuration > Social Media Sources").
Other sources: All requests, that came neither via search engines nor via social media sources.
Direct: All requests for which no other entry source type could be determined. This could be direct access, access via bookmarks or via email programs.
Entry Sources
Displays the exact referrer. The entry source type "direct" does not have a referrer.