The phrase "come up to" can have different meanings based on the context, but I'll start with the most common ones.
Physical Approach: "Come up to" often means to approach or get closer to someone or something. For example, if you are walking towards a friend, you can say you are "coming up to" your friend.
Meeting or Speaking: It can also mean to speak to someone, especially when you want to ask them something or start a conversation.
"Come up to" is a versatile phrase that can mean physically approaching someone, starting a conversation, or meeting a standard.