cовет/so-viet/-council,advice

The name of the political regime after the Revolution comes from the Russian word "council". In the early 20th century a  "soviet"  was a workers' local council . During the first Revolution in 1905 the workers began to strike and rebel. Such councils sprang up throughout the industrial centers of the country. They represented an autonomous workers movement, uncontrolled by the government. After 1905 the Soviets disappeared for a while, but re-emerged during the Revolution of 1917. With  the slogan "All power to the Soviets" the Bolsheviks gained popularity among the workers and  promised them a government run by industrial unions.
You'll learn more about the Russian Soviet history during your Moscow tours