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A PHP advance sitemap is very useful for increasing traffic to your site, and improving search engine rankings of a WordPress blog. You can enable your visitors to navigate your site easily, by making an efficient sitemap of your blog posts. However, keep in mind that we are not talking about a "Google Sitemap" here.

On-site search engine optimization is as important if not more important than off-site SEO. As a matter of fact, you can’t do successful off-site SEO without first optimizing your website. This is what you should do first and is the foundation of your success with the search engines.