care must be taken to select only reputable bureaus, the mananagement of which can show adequate records of achievment of satisfactory result.
These are comparatively small.
They search for the jobs and then look for job seekers. Some are contracted to recruit job seekers for big companies.
Some require you to pay for the services while others are paid by the corporations that hire them.
In most cases, they perform purely advisory roles. And they don't have the last say in the matter. Nevertheless, they have always been a veritable mean to get a good job.
It is probably due to their success rate that we have many pseudo job consulting sprouting and opening blogs to advertise the jobs that may or may not be available.
When using this medium, job seekers must be alert at any fraudulent ones who may want to exploit them.