Why do some companies on the recruitment website keep recruiting people?

It may be that I have never met the right one, or it may be a big liquidity, or advertising.

Enterprises have always been the most attractive, and the most common thing is that they have never found a suitable one and have been looking for it. Some jobs with a wide range of responsibilities and knowledge take a long time to meet the right candidates; Some enterprises belong to the problem of system or welfare, and fewer people are recruited than those planned by the unit, which leads to the need to insist on recruiting people.

Of course, it does not rule out that some enterprises advertise for publicity, and those who sign agreements specially do not want to waste them.