SPL stands for Solana Program Library in the context of the Solana blockchain ecosystem. SPL is a suite of on-chain programs maintained by the Solana team, and it is equivalent to what you might call “smart contracts” in other blockchain networks like Ethereum.
One of the key components of SPL is the SPL Token program, which is a standard that allows developers to create, issue, and manage tokens on the Solana blockchain. These SPL tokens are fungible and transferable assets similar to ERC-20 tokens on the Ethereum blockchain.