Yesterday I took the exam @ Sitecore for Advanced User and I passed with 18/20. So from now on, I'm a certified Advanced User 
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What is Sitecore? Sitecore is a WCMS (Web Content Management System). In our company we use it for our websites.
The advanced training gives you following insides:
- What is it?
- How does everything work (like content editor, page editor)
- How to publish
- Workflows
- Security
- Maintenance