JUST (JST) is a decentralized finance (DeFi) ecosystem operating on the TRON network. It provides a variety of services, including a decentralized stablecoin lending platform called JustStable, a money market protocol called JustLend, an automated market maker (AMM) platform called JustSwap, and an oracle protocol called JustLink. JST is used for several purposes within the ecosystem:

1. Paying Fees: JST is used to pay fees within the JUST ecosystem.
2. Governance: JST is the exclusive token for governance, allowing holders to participate in decision-making processes through voting or submitting proposals.
3. Incentives: JST can be earned through processes like mining, participating in campaigns, trading, or direct purchase on crypto exchanges.
4. Interest Payments: JST is used to pay interest to users who provide liquidity to the lending pool.
5. Platform Maintenance: JST is used to help maintain the platform and ensure its smooth operation.

Overall, JST plays a central role in facilitating the various functions and services within the JUST DeFi ecosystem.

To store JUST (JST) tokens, you can use various wallets that support JST. Here are some options:

1. Atomic Wallet: Atomic Wallet fully supports JST tokens, allowing you to store, manage, exchange, and buy over 500 crypto assets, including JST.

2. Guarda Wallet: Guarda offers a secure and user-friendly platform for managing JST tokens. You can create an online, mobile, or desktop wallet to store, buy, send, receive, and stake your JST tokens. Guarda is a non-custodial wallet, ensuring you have full control over your funds.

3. Bitcompare: Bitcompare provides a step-by-step guide on how to stake JST tokens. It recommends choosing a suitable JUST wallet to store your tokens before delegating them.

These wallets provide a secure and convenient way to manage your JST tokens.

To buy JUST (JST) tokens, you can follow these steps:

1. Create an account: Register on a cryptocurrency exchange that supports JST, such as Binance or Pionex. You can do this on their website or through their mobile app.

2. Verify your account: Complete the Know-Your-Customer (KYC) verification process to enable transactions.

3. Choose a payment method: Select a payment method to buy JST. Options include credit cards, debit cards, bank wire, and ACH transfer. Some methods are specific to US citizens.

4. Buy JST: Enter the amount of JST you want to buy and complete the transaction. You will receive your JST tokens instantly after the transaction is verified.

Additionally, you can also use other exchanges like Bitcompare, which provides detailed instructions on how to buy JST.