I saw this the other day on another group, the interesting graph to me was the Work one, it appeared that more people are returning to work, no sure it that is correct or not.
Possibly explained that at first a lot of people went into panic self isolation prematurely. Then the guidance was clarified and businesses learned how to cope (work from home etc). As it's Google data, it's possible that people have now labelled their residential address as 'work' and it's resulted in a slight up-curve in work location history.