The "S2SP" prefix in the file name likely stands for "Sledgehammer Ships," which refers to the game's development studio, Sledgehammer Games. The "64" suffix indicates that the file is a 64-bit executable, designed to run on 64-bit operating systems like Windows 10. The "Ship" part of the file name suggests that it's a final, release-ready version of the executable.
Players frequently encounter several hurdles when attempting to run this executable from a repack on Windows 10: s2sp64shipexe call of duty ww2 windows 10 repack