To perform well online, your articles need to have the most accurate and up-to-date information possible - and that means they need to be updated regularly. You never want to create a second new article on a topic you’ve already covered. Instead, go back into the original one, edit whatever information has changed, and republish. You should clearly state when the article was updated and why. If you’re referencing new data or findings, make sure you link to the latest sources too.