To follow (someone); to come along with someone; also to come attached or included (e.g., something comes with it).
犬が公園から家までずっと私の後をついてくる。
The dog follows me all the way from the park to my house.
友達が私の買い物についてくると言った。
My friend said they'd come along with me for shopping.
このスマホには充電器が付いてくる。
This smartphone comes with a charger.
小さな子どもは親の後についてくることが多い。
Small children often follow after their parents.