The goat or sheep (양, yang — Korean doesn't sharply distinguish the two the way English does, and both fall under the same zodiac sign) is read through gentleness and family harmony rather than personal ambition, a notably softer register than most of the animals around it in the zodiac.
A flock of sheep or goats moving together peacefully is read as family unity and steady, shared abundance — fortune that benefits the whole household rather than one person specifically. This is one of the more collective readings in the whole animal category, most other entries here being read through an individual lens.
A single goat approaching you calmly is read as peace and stability arriving, often specifically in a domestic or family context rather than career or money. A lost sheep, separated from the flock, is read as a family member drifting away or being out of touch — worth reading as a nudge to reconnect rather than a warning of anything worse.
A goat butting or behaving aggressively shifts the reading toward stubbornness — either your own or someone close to you — causing friction in an otherwise harmonious situation, a milder version of the same "stubborn obstacle" reading that shows up with an aggressive ox.