Each transaction comes with a fee of 0.00001 Lumens. XLM tokens are used to cover the cost of transaction fees on the Stellar network and ensure minimum account balances are kept.
Multiple currency transactions
Lumens also act as a bridge between currencies, facilitating trades between two separate currencies when there is not a large direct market by allowing one type of currency to be sent from one peer and arrive as a different currency to the receiver.
Stellar has a decentralized Exchange, it does not require a third party to store the funds, instead, users are directly in control of their coins and the conduction of transactions.
Stellar runs a network of decentralized servers with a distributed ledger that is updated every 2 to 5 seconds among all nodes and provides fast transaction speeds, by eliminating the need for validation and mining to create a leaner blockchain network.