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" Using SEO tools incorrectly can also make a difference to your site's success. by flushing it down the toilet. Be certain you know what you are doing and what search engines want to see before you use any SEO tools. For instance, keyword tools are perhaps the most important Seo tools available. With a good set of keyword tools, you can find out what keywords your pages currently target, how high in each major search engine they rank for each keyword, and what keyword density each page has, making it possible for you to refine your existing keyword targeting and even correct mistargeting.