Definition of Resume: A general document used in a proper format for a job interview by candidates to highlight their background, skillsets and work experience.
Resume is a self-endorsing document accompanied by a cover letter for an interview. An introduction to the recruiter is primarily done by a cover letter and your resume fully supports whatever is mentioned in the introduction. For example, if you have mentioned in your cover letter that you have widespread experience as a medical surgeon, your resume will work as a supporting document for the mentioned particulars with more information.
Decide on what is the most-essential information to be included in your resume and format it in best possible manner. Your resume particulars should serve a purpose of securing the job you have applied for. Which resume templates to use? How to use headings in the selected resume format? What information should be printed in capital or bold letters? Is the resume layout properly fixed and aligned? How to document your skillset and work experience? All these questions need to be addressed professionally.