The mempool is where transactions wait. Twitter is where traders cope.Satoshi Nakamoto (not really)
Both are holding areas for things that haven't settled yet. Only one of them involves crying.
Every Bitcoin transaction includes a fee paid to miners as an incentive to include it in a block. When the network is busy, the mempool (memory pool) β where unconfirmed transactions wait β fills up, and fees spike as users compete for limited block space. This fee market is a feature, not a bug: it prevents spam and ensures the network remains sustainable long after the block reward diminishes to zero.
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