Snowflake is a pluggable transport that can be used for Tor,
usually for accessing the network when a user is on a connection
with only partial internet access.

It uses WebRTC negotiations for NAT traversal to connect to mostly
short-lived volunteer proxies. These proxies can either be provided
by running a web browser extension or a standalone proxy.

Users behind restrictive access can use snowflake as a bridge,
e.g. by configuring it in Tor Browser.

Technical information is in
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/wikis/Technical%20Overview

This package provides a standalone proxy, for those who would like to use
their internet connection to provide access to others via this protocol,
and pluggable transports for Tor to allow using snowflake proxies.