Virtual memory, also known as a Page file, adds to the physical RAM by using disk space. However, moving the page file to a secondary SSD can help free up space if you run out of space on the primary.
Now, the dev has managed to get Windows 11 working on a miniscule amount of system memory, too. NTDev shared on X that they've managed to get Windows 11 running ... to shovel out my old Asus ...