The proposed VIP aims to accelerate the adoption and add utility to both VET and B3TR allowing everyone to use them for fees, enhancing the overall user experience. It also defines a standard—now integrated into VeWorld and the VeChainKit—to encourage the development of compatible and competitive infrastructure.
While the concept of a generic delegator was first introduced in VIP-191, no formal standard was previously established.
You can read the details here: https://github.com/victhorbi/VIPs/blob/vip-194-generic-delegator/vips/VIP-194.md
And access the swagger of the reference implementation here: https://mainnet.delegator.vechain.org/api