The designation indicates that the VM runs a 64-bit architecture , allowing it to address more than 4 GB of RAM and run modern 64-bit operating systems (e.g., Ubuntu, Debian, CentOS, or Container-Optimized OS).
The mention of usually refers to a specific trend in the Android virtualization and modding community, particularly surrounding tools often used for Android-to-PC gaming or running multiple instances of apps. f1 vm 64 bit