What are the benefits of using a Content Delivery Network (CDN) for a website? Please provide a detailed response with at least 5 sentences. Your answer must contain a title, wrapped in double angular brackets, such as <<importance of cdn>>. In your response, the word "performance" should appear at least 2 times. Include keywords [performance, speed, reliability, security, scalability] in the response. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. At the end of your response, please explicitly add a postscript starting with P.S.

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