The phrase in question represents the action of acquiring, without cost, a specific virtual studio technology (VST) plugin, version two, called Serum. This action implies searching for and obtaining a digital audio workstation software add-on that emulates a synthesizer, enabling users to create and manipulate sounds within a digital audio production environment, but doing so without purchasing it.
The desirability of obtaining such software stems from its utility in music production. It allows for the creation of complex soundscapes and electronic music arrangements that would be difficult or impossible to achieve with solely acoustic instruments. Furthermore, the historical evolution of software synthesis has made such tools integral to modern music creation workflows. The allure of free acquisition often arises due to budgetary constraints or the desire to evaluate software before committing to a purchase.