That's a long article itself but this might be a good starting point: https://consensys.net/blockchain-use-cases/ Consensys is run by an Ethereum co-founder and one of the most prestigious organizations in this space, so that page might seem intimidating but it's good, factual information.

Ethereum allows for the usage of unique and real items in the digital world. Money was obvious as it's impossible to have internet money if you can just ctrl+c and ctrl+v it to make copies. A bit of money is unique and can't be copied and thus is real and useful in ways previously digital information wasn't.

You can own a digital object or digital representation of a real object and use it on the internet. God's Unchained is a collectible card game like Magic the Gathering where the cards are digital, the rare cards are provably rare, and the players can trade the cards on any market out there or even take out loans on their valuable extra rare cards. This concept applies to many things including cars, houses, collectible fashion apparel, and anything else that there needs to be only one of.

DeFi is already re-creating all of the capabilities of the existing financial system but built on neutral and fair rules where no one person or company can arbitrarily change them and you always keep fully control of your assets.

There's too much to write but there is something here and it's worth reading about it with an open mind as it's very likely going to be important in a decade or so.