Boot - Uefi

: The Secure Boot feature verifies digital signatures for bootloaders and drivers, preventing rootkits and unauthorized code from executing during startup.

: Many UEFI implementations offer a graphical interface with mouse support and advanced diagnostics, a major step up from the text-only BIOS menus. How the UEFI Boot Process Works UEFI Boot

The shift from BIOS to UEFI introduced several critical improvements: : The Secure Boot feature verifies digital signatures

: UEFI can initialize hardware in parallel rather than sequentially, and it directly interacts with the OS, reducing the time from power-on to the login screen. UEFI Boot

Unlike BIOS, which simply executes code in a disk's first sector, UEFI understands filesystems (primarily FAT32) and searches for specific files: UEFI boot explained (for Linux users)