What IO.GOOGLE is?
Google I/O is Google's mostly annual developer conference, where it often introduces new software updates and hardware products. The opening keynote is the most exciting part, as that's when Google makes the big announcements. It's held on Day One. https://www.pocket-lint.com
Google I/O (or simply I/O) is an annual developer conference held by Google in Mountain View, California. "I/O" stands for Input/Output, as well as the slogan "Innovation in the Open". The event's format is similar to Google Developer Day. Wikipedia