Blockchain Ledger Explorer https://www.demilked.com/author/crawford18sheehan/ So, when there is a lot of transactions in the mempool and you compensated a relatively minimal transaction charge, your transaction can keep on being unconfirmed for an prolonged time frame because miners/validators will select transactions with bigger costs initial. These transactions remain in the mempool https://singnalsocial.com/story5607461/blockchain-explorer-ethereum-helping-the-others-realize-the-advantages-of-blockchain-explorer-mempool-https-cutt-ly-3rj9ygbc