In Ethereum , a block is proposed in each slot and votes

Time in proof-of-stake Ethereum is divided into slots and epochs One validator is randomly selected to be a block

A slot occurs every 12 seconds This is not an approximate or average but an actual 12 seconds You can actually compute the slot number from

ethereum slot machine On the contrary, if the proposer of the first slot proposes multiple blocks, this will make multiple checkpoints for the other validators to

slot area188 In every slot a validator is randomly selected to be the block proposer They bundle transactions together,