Job Recruitment Website - Job seeking and recruitment - It is often seen that some units have been recruiting the same position for a long time. Why?

It is often seen that some units have been recruiting the same position for a long time. Why?

Two possibilities.

1: The company itself is not short of people, but job advertisements actually play the role of general advertisements ~

2. The company's cuttlefish concept, survival of the fittest, in order to maintain vitality, the company constantly recruits people, but also to give employees a kind of pressure ~