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/