Unlike evidence of work, which works by using the miners themselves to outline the next block in a series, or evidence of stake, which makes use of staked tokens to determine the next block, evidence of background takes advantage of timestamps in its definition of blocks for your Solana chain. https://cnetnews.co.uk/unlocking-potential-the-solana-presale-paving-the-way-for-the-next-big-token-syncus-sol/