What is correlation?

This is the forth video in the "What Is?" series and covers the complex area of what correlation does and what does it provide. The ArcSight solution provides an extremely powerful correlation engine, but what does this mean and what does it provide?

This video covers all aspects of correlation and is a detailed explanation and examination of what it provides. This video is extra long one in comparison with my other 'What is?' videos at just under 30 minutes. But the point is to cover correlation in detail and what it provides and why thing like context and relevance are important in making security decisions.