An initial offering is when a project is listing for the first time and has not been listed anywhere else before. This is typically associated with an Initial Coin Offering (ICO) or Initial Exchange Offering (IEO). These types of offerings involve the sale of a new cryptocurrency, token, or coin, which is then listed on a cryptocurrency exchange or other platform.
A non-initial offering is when a project is already listed on other platforms such as decentralized exchanges (DEXs) or exchanges. This means that the project has already been through an initial offering and is now being listed on other platforms. Non-initial offerings are typically associated with secondary markets, where investors can buy and sell existing tokens or coins. These offerings may also involve the sale of new tokens or coins, but they are not considered initial offerings.