If you have watched Stanton's TED Talk previously (originally from February 2012) you may notice that the commercial seamlessly stitched together six separate "clues" that he discusses during the presentation. The audio from the commercial states,
We all love stories - we’re born for them. They can’t be artificially evoked. It doesn’t always mean plot or fact. They aren’t an actual exact science, that’s what’s so special about stories - they’re not predictable. It’s capturing a truth from your experience. It could cross the barriers of time, real and imagined, expressing values you personally feel deep down to your core. And that’s the first story lesson I ever learned.
To add to the emotion, the Google commercial also features the second half of the track titled, Ending (by Thomas Newman), featured on the Finding Nemo complete score soundtrack given to the cast and crew of the project. You can also find the song under the title of Fronds Like These on the standard Finding Nemo soundtrack - the portion of the song from the commercial starts at 51 seconds into the song.
Pixar Post - T.J.