In north america, what you want to look for is 'Certified Humane'. They actually have inspections of facilities and generally enforce better baseline standards

In north america, what you want to look for is 'Certified Humane'. They actually have inspections of facilities and generally enforce better baseline standards for animals, like minimum spacing. Not perfect, but probably the best you'll get in a grocery store. Everything else is just marketing terms, and effectively unregulated: 'cage free': a bunch of chickens packed into a large room, effectively a cage. Just not individual/tiny cages. 'free range': they have access to an outdoor area in theory, but it might be a tiny cage, no guarantee the chicken was ever able to use it. 'pasture raised': animals generally spend more time outdoors than indoors, but no guarantee.