You can speed up slow ETH transactions by adding Gas to a transaction. This can be a smart move if the network is congested and you want your transaction to settle quickly.

Adding Gas won’t always work, but it is generally going to speed up a transaction by incentivizing miners to prioritize it.

Alternatively, you can simply cancel the transaction and try again with more Gas.

To learn more, see this article: https://ethgasstation.info/blog/stuck-transaction-guide/

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"Speed Up Slow ETH Transactions By Adding Gas" contains information about the following Cryptocurrencies:

Ethereum (ETH)