Once upon a time, onsite optimization was the most crucial factor in search engine ranking. Webmasters and SEO experts spent ample time ensuring keywords were used in all relevant tags, and that the keyword concentration on each page was just right (usually 5-7%). Then came all the spamming and keyword stuffing, as webmasters and SEO experts fought viciously to usurp one another in the ranks. Search engines took notice, and adjusted their scoring algorithms accordingly. Onsite optimization lost its footing.
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