Picasa -> Photos was actually a new thing, right? Photos is cloud-hosted while Picasa was a program you installed on your computer and had web-sharing abilities.

Google Talk was the original one, then transitioning to Hangouts, while Allo and Duo were created too (I supposed to compete with Apple's iMessage and FaceTime), which also died, and finally we got to today with Google Chat and Google Meet.

I think they mean turn by turn navigation, which launched in late October 2009 and so barely fits in the 15 year window. You could say that it's a feature of Google Maps, but since it relied on maps that Google made instead of licensed map data, that feature was a much larger undertaking than the previous Google Maps product to that point.