It's a nice little scheme that incentivizes saving CO2.
There's a CO2 tax on gas and other fossil fuels, part of this tax revenue is then, once a year, distributed back to taxpayers. The idea is that people who don't consume a lot of fossil fuel earn money through this scheme, while those who user above average pay more than what they get back.
Of course this is not well communicated from the gov and random cash appearing in everyone's account can accelerate the already high inflation.
It looks like it's designed so that people who live in the country get more, not necessarily those who consume more. Within a region, everyone gets the same amount. So within a region, those who consume less win, and those who consume more lose.