on file

Looking for some insight here. Does this mean you are in file and when someone quits its your chance to take up the roll? Is it we are going to put you in limbo before you get hired? Will it be so far in the future like mass effect before I get this job? Stuff like that. Sometimes its good to...

Anyone know what on file means? Am I just waiting for someone to quit their job so I can take theirs? I really want to be hired, its the most ideal job to me. Feels depressing just being On File and not knowing. Almost like I'll be scrubbed away.