"other" generally means "anything that doesn't fall into the other categories". Unfortunately that means that it tells us nothing about what is in there.
If you compare the second and 3rd shots you see different sizes for the same categories, suggesting that the different apps are using different ways of counting things. And in the third shot about 27GB are accounted for with only 1GB of "other", so I'm inclined to treat the second one as "unhelpful".