In contrast to proof of work, which utilizes the miners them selves to determine the next block in a sequence, or proof of stake, which takes advantage of staked tokens to determine the next block, proof of background uses timestamps in its definition of blocks with the Solana chain. ” https://cnetnews.co.uk/unlocking-potential-the-solana-presale-paving-the-way-for-the-next-big-token-syncus-sol/