Blockchain Explorer Meaning https://www.instapaper.com/p/16800477 So, when there is a large number of transactions inside the mempool so you compensated a comparatively minimal transaction cost, your transaction can continue to be unconfirmed for an prolonged length of time considering the fact that miners/validators will pick out transactions with increased charges first. https://ledbookmark.com/story5892249/near-blockchain-explorer-a-secret-weapon-for-blockchain-explorer-analytics-and-web-services-https-cutt-ly-3rj9ygbc