Google is due to roll out its latest search ranking algorithm update. After three years Google has planned to bring changes in its search engine.
Following the way in which mobile phones are driving internet uptake and innovation, this update will focus on favouring mobile devices and websites that aren't mobile-friendly are likely to find their search results ranking gets clobbered.
U.S. technology website WIRED described Tuesday's algorithm switch as "likely the biggest change of the past three years.
"And it's reminder of the wonderfully magnanimous yet deeply selfish way that Google uses its market power to accelerate changes across the rest of the Internet," it added.
The change comes in the same week as a Google announcement it will launch its own U.S. mobile wireless service, with considerable potential savings for customers using their devices at home and for international travel.
"We want to make sure they can find content that's not only relevant and timely, but also easy to read and interact with on smaller mobile screens," Google said in a statement to WIRED.
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In 2011, a change to Google's search algorithm affected 10 percent of English-language websites, while the 2012 change impacted some four percent, according to WIRED.
But the recent change, the extent of whose impact cannot yet be fully measured, has also sent shockwaves among brand owners and marketers, for whom online visibility is hugely important.