I’m trying to undertand the outputs here.

Someone I know combined 4 inputs, and sent them via 1 transaction to a different address.

What are those two little tail outputs? One is miner fee, I’m assuming. Is the other the change address?

If so, does that mean there are always a minimum of 3 outputs to an on-chain transaction?

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On a related note, if anyone can recommend any tutorials or resources to start studying this in more detail, I’m excited to learn 🧐📚 📖

It could be a minimum of two outputs:

1st Output: is the sweep of the entire amout of funds to the new address

2nd Output: is the miner fee.

https://99bitcoins.com/bitcoin/fees/

Got it - so the 3rd is likely change because the wallet wasn’t swept. Thanks!