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Mind using a search engine ?

I already read up on it on the gridcoin website.

But I also would rather discuss with people who know things rather than try to sift through what could potentially be misinformation. Just a preference.

Proof of work requires that you spend a lot of electricity and computation power to solve a calculation in order to create the next block & gain rewards.

Proof of stake requires far less electricity/computation-power and uses your balance to try and create the next block. The more coins you have the more likely you'll create the next block & gain your rewards.