It's time to talk about the rarely explored QDF, or "Query Deserves Freshness." If you've been reading the 21 Handshake blog, you know we like digging down into specific factors that Google uses to determine page rankings – especially factors you can control, giving your site a boost by making Google happy. QDF refers to the important of having fresh content on your website: Let's look at why Google likes it.
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via Digital Marketing News