1. Multicurrency Wallets: Some cryptocurrency wallets support multiple currencies and might refer to individual wallets for each supported cryptocurrency as "sub-wallets." Each sub-wallet within the main wallet can be used for a specific cryptocurrency, allowing users to manage different assets within a single application.
2. Hierarchical Deterministic (HD) Wallets: HD wallets generate a master seed from which multiple keys or addresses can be derived. Each of these keys could be considered a "sub-wallet." HD wallets are often used to enhance privacy and security by providing a new address for each transaction.
3. Blockchain Platforms: On certain blockchain platforms, the term "sub-wallet" might refer to a secondary wallet or address associated with a primary wallet. This can be used for organizational purposes or to manage funds separately for different purposes.

If "SubWallet" is the name of a specific wallet or platform, I recommend checking the official website or documentation associated with it for the most accurate and up-to-date information. The cryptocurrency and blockchain space can evolve rapidly, and new projects or developments may have occurred since my last update.

Always exercise caution when exploring or using cryptocurrency wallets, ensuring that you download software from official and trusted sources. Additionally, keep your private keys and recovery phrases secure, and be wary of phishing attempts and scams.

‍