High Quality Content by WIKIPEDIA articles! The Salmon Protocol is a message exchange protocol running over HTTP designed to decentralize commentary and annotations made against newsfeed articles such as blog posts. It allows a single discussion thread to be established between the article`s origin and any feed reader or "aggregator" which is subscribing to the content. Put simply, that if an article appeared on 3 sites A (the source), B and C (the aggregates), that members of all 3 sites could see and contribute to a single thread of conversation regardless of site they were viewing from.