A summary of qualifications in a resume is a two or more sentence description that explains in few words what re your most important traits to be hired for a given position.
This qualification summary should reflect the best abilities the person has to perform well in a job and looks very attractive to the person (employer) who would read it.
This kind of summary can be presented in bullet list, paragraph format , statement or title, and it should talk about your skills, experience, abilities, education and accomplishments.
This is a random example for a person applying to be an English as a Second Language teacher and it will be presented in a bullet list format.
ESL TEACHER
• Over 10 years experience in English teaching.
• Ablity to enhance students performance.
• Excellent reading, writing, listening and speaking English skills.
• Professionalism in accomplishing teaching goals by using different teaching methods.
So, depending on what job you want to apply for, so are the qualifications you will write on your resume.