It focuses mostly on payment processing solutions (transactions) and creating useful stablecoins.
Terra blockchain allows its users to instantly buy, sell, trade, or exchange stablecoins on their own network.
Note: Stablecoins based on Terra blockchain have different features than Tether stablecoin. Terra is a protocol that creates multiple stablecoins that track the value of the fiat currency to which they are pegged. For example, Terra has a stablecoin for several fiat currencies from different countries (USA, UK, etc.).
It has two cryptocurrencies within its own blockchain - Terra and Luna.
Terra - stablecoin pegged to a certain fiat currency (from a certain country) and is named after that fiat currency.
For example there is a Terra stablecoin that tracks the price of the US dollar and that is why it is called Terra USD and has the acronym UST. There is also a Terra stablecoin that tracks the South Korean currency Won and is called Terra KRW (KRT abbreviation).
Luna - a coin used to manage the network and maintain protocols. Because it is a Proof-of-Stake network, all validators who check and record transactions on the blockchain receive rewards from transaction fees.