Provide a detailed explanation of the importance of customer service in business, ensuring to include the following points: * How it impacts customer loyalty * The role of customer feedback in improving service * How it can lead to increased sales. Your response should contain at least 3 placeholders represented by square brackets, such as [company name]. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. Finish your response with this exact phrase [ender]. No other words should follow this phrase.

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