1Refers to a particular time in the past — "at that time," "in those days," or "around then" — commonly used when narrating past experiences or memories.
大学生だった。その頃は毎日アルバイトをしていた。
I was a university student then. Around that time, I worked part-time every day.
その頃、この辺りはまだ田んぼばかりだった。
Back then, this area was still mostly rice paddies.
その頃はまだ携帯電話も普及していなかった。
At that time, mobile phones weren't widespread yet.
子供の頃の写真を見ると、その頃の記憶がよみがえってくる。
Looking at photos from my childhood brings back memories from that time.