What does it mean when a girl says "I'll talk to you later."?

Anonymous
So I was texting this girl after just getting her number and she said, "I have to wake up pretty early tomorrow so I've got to go to sleep. I'll talk to you later. Night!" I was wondering what it means if a girl says I'll talk to you later? Like should I start a conversation sometime or wait for her to do it?
What does it mean when a girl says "I'll talk to you later."?
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