The overhauled service allows users to customise what is displayed based on their interests, log in with Facebook to share articles and view what is trending around the web via a sidebar.
CEO Marissa Mayer explained that the central news feed features "infinite scroll", enabling users to trawl through a never-ending list of articles tailored according to their personal preferences.
"The new Yahoo experience works well on the go - we've optimised it for smartphones and tablets," said Mayer. "And, thanks to some under-the-hood improvements, Yahoo is also faster."
Yahoo is undergoing a transformation after refreshing its management setup in a bid to shake off its recent financial woes and claw back ground on the likes of Google.
Mayer has already brought in wholesale changes to the firm, poaching Google executive Henrique De Castro to take up the vacant post of chief operating officer and launching a revamped email service.
Yahoo has pledged to make further enhancements to the service going forward.