http://bit.ly/c1hEEM
"...Web Engagement Management is a composite concept. These are the 5 parts we consider its core:
1. Content Optimization
This include native or tightly integrated analytics, content and experience personalization, multi-variate testing and optimization and SEO.
2. Multi-channel Management
Consistency is important and WEM maintains it by delivering the same message/experience to customers across devices and channels both online and offline.
3. Conversational Engagement