“By buying [unnecessary product] you will help [marginalized group] to gain a livable income and also send their kids to school instead of sending them to [work place with - even for adults - horrible work conditions]. Also, when buying [product] we will save [arbirtary area] of [rainforest/ coral reef/ mangrove swamp] that would otherwise have been destroyed [but not by us]. Additional to that, your purchase helped us to save [arbitrary ammount of CO2 - at least in a completely hypothetical scenario]. While using [product] you will make the world a better place.”
As a customer there is barely any way you can ensure or check that these things are true. It cannot be possible to save the enviroment while buying stupid products like, for example, internet-of-shit-devices which will be phased out in no time or single use products made from plastic or other harmful materials that are not recycleable.
All these claims are just an indulgance trade - like it is done for centuries in a religious context. It is just that you have an excuse to consume more, because they to something to help people/ enviroment. If there was a product that would have been advertised as: “Well, we irretrieveably destroyed 100 km^2^ of nature, and for each single product in average two workers died and at end-of-life this product will fuck up the environment once more - also it will impair your health just by existing”, it would be horrible - but at least it would be honest.