Screening is the practice by which the recruiter narrows the applicant pool. At this point, the recruiter will only consider the candidates that meet the minimum qualifications. Typically the resume, cover-letter, application, and references are used at this time. Recruiters may utilize a brief phone interview during this time as well. This helps to assess qualifications, fit, and current interest in the position.
Selection varies immensely.
Recruiters will employ the most advantageous way to seek qualified candidates possible. The formal interview is critical during this process. The employer will use this time to see if you are the best fit for the position. Fit goes beyond qualifications. Know the position and what they are looking for in a candidate.