The transaction fee pays for the gas required for your transaction.
Transaction fees are paid in native tokens.
What does this mean? If you're sending your funds from Cosmos, you pay with $ATOM if you're sending funds from Osmosis, then you pay with $OSMO.
When executing a transaction you can choose between [Low], [Average], or [High] transactions fees.
How do I choose between slow, normal, and fast fees?
When on the step where you're adding the amounts you want to transfer & receive see below [continue]
Click on [Fees (included)] to open the fees section
You'll see you have three options to choose from
Choose your preferred one
📌 Please note that some validators/chains do not accept [slow] transaction fees
📌 When a transaction fails, fees apply, so you may see your balance go down even if the transaction didn't go through
📌 Avoid swapping all your balance, there are fees to pay for doing so and if you don’t take this into account, your operation will fail.