Was it actually revenue growth from adverts or was it from a sudden splurge in pandemic-era spending caused by governments all over the world panic-signing up for Google Classroom and buying Chromebooks?

Because I can see pretty much all of the 'growth' that occurred during 2020-2021 being unwound gradually as people realise that a lot of what happened was an absolute disaster for society.

When it comes to making any predictions for the future you really have to write off the 2019-2021 pandemic era figures as a glitch.