The recruiter is always looking for the right person for this one special place in the organisation.

To find the right person, this person should know he is wanted. Therefor it's very handy to let people know, what you are looking for in this person.

The easiest way is telling your network your are searching, so called networking. By informing your network about what you can do for them. Online networking works this way as well, you are informing your network about what you are doing.