Title, basically.
Where I live, 'suburbs' = not the city centre, detached/semi-detached houses with back gardens & sometimes small front gardens + 2-3 stories, sometimes terraced housing as well, and alrightish public transport. It's where commuters live who travel half an hour to an hour to get to work.
Any discussion of American suburbs is all about how they push out black folks, are a huge waste of resources, etc. I don't know enough about America to have an opinion but I feel like I'm missing something.
The American bourgeoisie began fleeing the suburbs a decade or more ago in favor freshly gentrifying urban centers. So now the working class gets to inhabit the 1960-1980s cultural wasteland without the benefit of public transit or affordable rent.