veANGLE stands for "voting-escrowed" ANGLE, and is the new governance token of the Angle Protocol. You could find more details in Angle Docs
ve3Angle is tokenised version of $veANGLE
veToken Finance enables users to deposit $ANGLE and converted to ve3ANGLE And users are able to stake and unstake ve3ANGLE. By staking ve3ANGLE, Users are able to get the same rewards from veANGLE, and additional rewards from Angle Farms. And you could exchange ve3ANGLE for ANGLE at the secondary markets.