Responsive web design helps you to focus your SEO efforts on one single destination in spite of trying to build traffic and links for three or more sites. Some businesses go for a mobile app as an alternative to mobile site; the problem with that is Google cant index apps and therefore wont be able to explore it. Also, any user-generated content added to an app wont be indexed. Responsive web design caters to this problem by making content that can be easily indexed by search engines.
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