Parami Protocol proposed an AD 3.0 paradigm powered by blockchain for Web 3.0. It provides a protocol stack for building a user-centric, tokenized advertising economy. Parami Protocol provides a complete set of PDID (Parami DID) solutions compatible with W3C DID standard onParami Node, and expands its business on the basis of DID standard. Parami Protocol will also provide DID aggregators for other DID standards.