Explain KPIs what are they, as they apply to web analytics. Explain your position if you agree or disagree with their relevance in web analytics. Explain your position.

Explain KPIs what are they, as they apply to web analytics. Explain your position if you agree or disagree with their relevance in web analytics. Explain your position. Has to be at least 500 words with references. I would greatly appropriate it by 10pm EST if possible