Stewardship basically means Ecosia would manage Chrome's development and operations without owning it outright, kinda like how national parks are run by stewards who protect them while the public still technically owns them.

Seems like it allows a non profit to assume control of a company without having to pay out funds to actually purchase it. They apparently have to reinvest all profits back into the company rather than directly benefiting from it. Though the article does mention under the proposal, some unspecified portion of Chrome profits would go toward 'climate action', so there's some vague positive out of it.

Seems like it would be pretty great honestly, so I can't imagine it'll be accepted.