[kosolam]

Same utility as animations in general. Such animation as this one for example fits when a user receives something or solves a challenge and similar

[naikrovek]

Those don’t have utility, either.

I don’t know why web devs feel like they need to tell users when they’ve succeeded at something like clicking a button.

People understand when they’ve accomplished something. We don’t need rituals around this, even simple ones like this.