In lesson 10.1 Bank Account
The sentence “Nein, ich bin gerade erst hierher gezogen. No, I just moved here.” is introduced. I don't recall hierher ever being introduced or used in any previous lesson so I was expecting some kind of explanation as to why hierher was used rather than the familiar heir. Is there any reason why one is preferable to the other in this sentence or is it just an effort to expand our vocabulary?