If you don’t know what is a sitemap, I strongly encourage you to fill this gap in knowledge first and then get back to reading. It seems to be clear that manual updating a sitemap can turn into a horror. Hopefully we can make the Rails do the job for us. So, what components are we going to need to build a dynamic sitemap? Well, we are going to need a separate action (or even controller), an XML view and model methods to provide us with URL data.
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Sitemap is the most convenient way to tell the search engine how does a website structure look like and what URLs does it contain. The problem is that some pages may be nested to deep or somehow unreachable to the search engine. Building a sitemap is a reliable way to keep the search engine aware of every subpage, even if it is located deep in the site structure or if its URL is available only through Javascript call.
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