Residual SEM maximizes your investment
When performing searches on the Web through the major search engines, these engines strive to present you with links to sites and pages with content relevant to the keywords and phrases you enter. While fresh content is important to the engines, so too is relevancy and popularity.
Content that has been around for a while and that is enjoyed by many people on a regular basis through time has more precedence to the search engines than content that has been recently published and viewed only by a small number of people.
This is the essence of residual search marketing.
Granted it is not realistic to keep a single piece of content visible and popular through long periods of time, especially in competitive search markets, your goal should be to build trust with the major search engines by focusing on the same topic each day over long periods of time. By doing so, the engines recognize your blog as a valid and trusted source for this particular information and therefore present it to users searching for what you publish.
Additionally, each time someone clicks on your listings in the SERPs, this tells the search engine that the content had initial value. By displaying links on your landing pages to more related content, these users are likely to click on them which tells the search engine that your content was relevant and useful which in turn gives that listing even more credibility. Unlike PPC where each click incurs a financial transaction, each click on your organic listing increases its value and thus maximizes your ROI.

by Langley Dodge
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