Stellar is an open-source blockchain network that facilitates seamless digital storage and movement of virtually any currency such as dollars, pesos, or even Bitcoin.

Lumens, denoted as XLM, is the Stellar network's native digital currency that is used for transacting on the Stellar network.

Stellar's main value proposition is its ability to make money borderless through the tokenization of traditional currencies such as US dollars that are backed at a 1:1 token:dollar ratio.

From Stellar's website: "A Venezuelan can hold some of his family’s net worth in dollars. A Filipino expat can send dollars back home, and the recipient can hold them, safely and digitally, until she’s ready to exchange. An American company can pay a Mexican vendor in dollars, and the vendor can pay its suppliers in turn, with a five-second, rather than a five-day, wait to settle."

In short, Stellar makes it affordable and easy for anyone and everyone to send money anywhere.