The logo they used from 1999 - 2010 [1] was the best. It was clear, distinctive, and pleasing to the eye. The one they used after that until 2013 was a step backwards, but not too much worse. Those two are better than the rest by a huge margin.

This latest logo is... I don't have the right words. Looks daycare copy. Welcome to Google. We're not useful, we're safe.

1. https://en.wikipedia.org/wiki/Google_logo