why to promote and how to promote my employment hiring site?
 

why to promote and how to promote my employment hiring site?

Craigslist, Backpage and Gumtree would be good places to start. Not sure what you mean by why lol!

Think about where people go when they look for a job. Many of them go to search engines (which is why you should consider PPC), but they also go to sites like Craigslist and backpage. Try advertising the site there.