Create, enable and scale economic and digital exchange across and between diverse sectors.

Seems cryptocurrency related. Lot of marketing fluff.

Beckn Protocol is perhaps the least well-known project outside of tech circles, but is likely the most impactful of all work Nilekani has championed since Aadhaar

Who and what are those?

The github repo is slightly better, but not by much:

Beckn is an open protocol that allows local businesses across any industry to be discovered and engaged by any beckn-enabled application. Beckn protocol helps businesses co-create solutions for the masses seamlessly, by combining services of any form or provider.

Beckn protocol is a collection of open specifications consisting of protocol APIs, message formats, network design and reference architectures to allow any two entities to execute commercial transactions without being on the same platform.

This server-to-server communication protocol allows any consumer facing online platform to discover and transact with any business with minimal implementation overhead. The server-to-server nature of the protocol allows rich user experiences to be built by bundling services from multiple independent platforms.

Beckn protocol decouples the demand side digital infrastructure in the form of apps and other channels from the supply side service provisioning infrastructure. It does this by making integratedservices available not just on a single platform but potentially on any online consumer interface, (online maps, messaging, wallets, voice assistant apps and devices) that have mainstream adoption in a city.

Beckn is a protocol, not a platform. It adopts a decentralized architecture that obviates the need for creating a centralised platform in order to integrate services from multiple providers simultaneously ensuring privacy and security by design by enabling secure, encrypted iteractions.

The project could really use a “What problem is this trying to solve?” section. Is it aiming to replace something existing like HTTPS/Visa/etc?