Candidates often leave off very important and critical experience/information that is pertinent to the job they are seeking. Just as bad is to include this important info but burying it so deep into the resume the recruiter will not see it.

No recruiter has the time to play Sherlock Holmes to figure out a candidate's background. Jobseekers must be aware that recruiters receive literally hundreds of resumes a day and spend only about 10 seconds "skimming" through each resume.

This is why it is imperative that if a job seeker possesses the requirements of the position, that they GRAB the recruiter's attention IMMEDIATELY with these skills/experience. 

The best scenario is to customize each and every resume that is sent out and tailor it to the "hot buttons" that will catch the employer/recruiters attention within 5-10 seconds