What is "profintern"

The Red International of Labor Unions (RILU) (Russian: Красный интернационал профсоюзов — Krasnyi internatsional profsoyuzov), commonly known as the Profintern, was an international body established by the Communist International with the aim of coordinating Communist activities within trade unions. Formally established in 1921, the Profintern was intended to act as a counterweight to the influence of the so-called "Amsterdam International," the Social Democratic International Federation of Trade Unions, an organization branded as class collaborationist and an impediment to revolution by the Comintern. After entering a period of decline in the middle 1930s, the organization was finally terminated in 1937 with the advent of the Popular Front.