Doubt about the advanced home row config

[mastermach50]

what exactly does (multi <letter> @tap) achieve in the advanced home row config (lines 49 to 56)?

Why is it not just <letter> ?

[jtroo]

kanata/cfg_samples/home-row-mod-advanced.kbd

Lines 1 to 7 in 4ab74b8

	;; Home row mods QWERTY example with more complexity.
	;; Some of the changes from the basic example:
	;; - when a home row mod activates tap, the home row mods are disabled
	;; while continuing to type rapidly
	;; - tap-hold-release helps make the hold action more responsive
	;; - pressing another key on the same half of the keyboard
	;; as the home row mod will activate an early tap action

kanata/cfg_samples/home-row-mod-advanced.kbd

Lines 3 to 4 in 4ab74b8

	;; - when a home row mod activates tap, the home row mods are disabled
	;; while continuing to type rapidly

[mastermach50]

oh, thanks