Basically, these:

• You want your transaction to be included into a block while there are 260k waiting on the mempool right now.
• You're using an online wallet and not a non-custodian.
• You're using segwit nested instead of native. (which would slightly decrease the fee)

Bitcoin isn't a cryptocurrency to use it for micro-on-chain transactions. These days are gone. Hence the development of the lightning network.