What's the biggest issue? Cowan doubts whether social media can drive valuable link equity. The shortened URLs used on Twitter to stick to the 140 character count undermine the anchor text benefits of links and reduces the ability to rank for anything specific. He does, however, identify two areas where social media makes an impact. The first relates to Google's universal search updates. This means "non-core" listings such as images, blogs, news, maps and shopping listings have prominence in search engine result pages.