Social media will become a big ranking factor. The next question for SEOs to answer: how do you balance your investment in link building with your investment in social media? While a search engine can scan the contents of a web page and get a good idea regarding the topic of a web page, this isn’t sufficient because it doesn’t provide the right type of signals to indicate which pages are the most important ones for any given topic (i.e., of web pages on the same topic, who to rank first, second)……
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