Why is making an email viewable as a webpage a helpful feature from a marketing perspective?

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http://www.youtube.com/watch?v=5i1VK5NPrcU ** Desamark ** http://www.desamark.com/

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https://desamarkbilbao.wordpress.com/2017/02/25/why-is-making-an-email-viewable-as-a-webpage-a-helpful-feature-from-a-marketing-perspective/ **Linda D. Service / LindaDService / LindaService **DesaMark** https://desamarkbilbao.wordpress.com/