Commissions in the crypto world may seem small, but if not managed well, they can seriously affect your profits. There are different types of fees: for trading, withdrawal, and blockchain networks. For example, trading on a CEX may involve a 0.1% fee per transaction, but that number increases if you make many trades daily. In DEXs, gas fees can be even higher during times of congestion, especially on Ethereum. You should also understand the difference between 'maker' and 'taker', as it affects how much you pay. Choosing networks with low fees or using promotions can help you optimize your costs.