One of the first steps every recruiter must become good at doing is understanding the position that you are recruiting for.
This usually means to get you hands on the job description. Your first job is to get hold of the job description . You can usually get this from the company website, or if not there from the client, or from the account manager or recruiting manager assigned to the client.
The person who usually knows most about the position is the direct hiring manager for the position. So the ideal situation is to arrange a meeting or phone call with yourself and the hiring manager. If you can't meet with hiring manager, you should try to meet with the next best available person that knows the position. This could be the recruiter for the client, your account manager, your recruiting manager, a fellow recruiter that had previously worked on the account, or someone else. The goal is to extract information about the position from the most accessible person that knows the most about the position.
Then your task is to study the position. I mean really study. Your job is to find a candidate for the position, so it is to your best interest to know as much about the position as possible. If it is a position that I have never recruited for and don't know much about, I have even read the job description line by line about 5 times, wrote down key points of the job description on paper, and studied it some more.
I cannot over emphasize the importance of really taking the time to understand the position. If you have a full grasp of what the hiring manager is looking for, then it will make your job finding the candidate a whole lot easier.