Hovering over the button brings up the news and interests tray and moving the cursor away from the tray hides it. The news and interests feature is being rolled out as part of Microsoft's KB5003214 update for Windows 10, which will be delivered directly to users - if it hasn't been already - assuming they have automatic updates turned on. It takes the form of a small button that displays the weather alongside the system tray in the taskbar. News and interests is intended to provide a quick and easy way for Windows users to keep up to date with information that is relevant to them. Since April, Microsoft has been rolling out a 'news and interests' feature to Windows 10, which some users will like and others will want to disable.
