The Site Tree is a logical organizational structure, and it usually follows one of the scenarios listed in Site Tree Best Practices.
Having said that, the Site Tree is also used to separate configurations between database types, IP Addresses, Agents, Security Policies, Agent Monitoring Policies, etc...
Something you might like to do though is review this webinar regarding DAM Deployment Best Practices on our YouTube Channel.
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John Thompson
Director, Channel Presales
Imperva
San Diego CA
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