The strategy and goals vary depending on the country. The documents that have been made available through the public inquiry into foreign interference refer to the various strategic goals of countries such as China, Russia, Iran, Pakistan and India.
You have to put yourself in the enemy's shoes and think about what they want. According to the document summaries that have been released under the inquiry, Russia's goal is to stir up trouble, wreak havoc and create social polarization. China's goal, however, is quite different.