How long does a ERC20 transaction take?

I'm curious about the duration of ERC20 transactions. Could you please elaborate on how long it typically takes for an ERC20 transaction to be completed? Is it a matter of seconds, minutes, or does it vary depending on certain factors like network congestion or transaction fees? I'm also interested to know if there are any strategies or best practices that can help speed up the transaction process. It would be great if you could provide some insights into this aspect of ERC20 transactions. Thank you for your assistance in clarifying this matter.