[help] what does this do exactly?

[Elvenbane-veknilash (Elvenbane)]

@Fizzlefuze-thrall

When mousing over a friendly unit or unit frame, cast the spell on them. Otherwise, cast it on me.

@Elvenbane-veknilash

Helpful Mouseover Macro

Cast a helpful spell prioritizing mouseover.

#showtooltip
/cast [mod:alt,@player] [@mouseover,help,nodead] [] SPELL

#showtooltip
/cast [@mouseover,help,nodead] [@player] SPELL

This won’t let you cast on your target while targeting them, only mouseover. If you want it to also do target use the following and make sure your Self Cast setting is set to Auto.

#showtooltip
/cast [@mouseover,help,nodead] [] SPELL