Sanctions: peace, security and human rights

How to stop the war in Ukraine? Countries apply sanctions. Canada cut Russia and Belarus from the Most-Favoured-Nation Tariff treatment. In just one day, the EU released nine decisions and regulations concerning restrictive measures against Russia. Customs in Lithuania extended controls to check whether sanctioned banks were not used for payment. Many businesses, especially SMEs, for the first time, one way or another, have encountered the impact of sanctions. So what are sanctions? What are the related developments in general?