Sitecore 9.0 Experience Platform
Documentation
Collect and search experience data with xConnect and the Experience Database (xDB).
Getting started with xConnect
An overview of xConnect and the xDB, and how to get started with the xConnect Client API.
xConnect and the xDB
xConnect is the service layer between the xDB and all client applications. Use xConnect to get, create, search, and update contacts and interactions.
Marketing Automation Engine
The Marketing Automation Engine processes engagement plan enrollments and moves contacts through plans.