Biggest change in two years could see turmoil in search rankings as mobile-friendly sites take prime spots due to algorithm change

Having a site that is friendly to mobile browsers on smartphones and tablets will be key from Tuesday as Google rolls out a new mobile-focused algorithm.

The update to the way Google ranks search results will take into account how mobile-friendly a website is. This means companies without a good mobile website will suffer, as searchers on mobile will see sites with good mobile experiences ranked higher than those with no mobile or poor mobile sites.