to enter vs to join in Korean
들어가다vs가입하다

들어가다to enter
들어가다 means "to enter" or "to go in." Use it when a person or thing moves from outside to inside a place, like a house, classroom, store, or tunnel. In daily English, it often matches "go in" as well as "enter."
When to use to enter
가입하다to join
가입하다 means to join or sign up for a group, service, club, or membership. You use it when someone becomes a member of something, like a website, gym, or school club. In Korean, it is often used for memberships and subscriptions, not for simply going with friends somewhere.
When to use to joinHow they differ
to enter (들어가다) and to join (가입하다) are nearby Korean vocabulary items learners often meet together. Use “to enter” when 들어가다 means "to enter" or "to go in." Use it when a person or thing moves from outside to inside a place, like a house, classroom, store,… Use “to join” when 가입하다 means to join or sign up for a group, service, club, or membership. You use it when someone becomes a member of something, like a we…