Questions & Answers about Det er min veninde, der har fået et nyt job i byen.
“Det er … der …” is a very common Danish structure called a cleft sentence. It’s used to emphasise one part of the sentence.
Det er min veninde, der har fået et nyt job i byen.
= It is my friend who has got a new job in town. (emphasis on my friend)Min veninde har fået et nyt job i byen.
= My friend has got a new job in town. (neutral statement)
So both are correct, but “Det er … der …” puts focus on who got the job, often in contrast to someone else (e.g. not my brother, but my friend).