A resume is a visual representation or snapshot of your top relevant professional qualifications. Its purpose is to advance you to the interview step in the job-seeking process. Your resume is sometimes the only chance to communicate your skills and abilities to a potential employer because it provides a snapshot of your qualifications. The type, format, length and content of the resume are important, as these features determine whether an employer will grant an interview.
Your resume is not a "transcript" nor should it be a professional "report card" that lists all you have ever done. When you are targeting a specific job/organization/industry the more relevant the better. A successful resume will be:
Targeted: Your resume should be designed for the specific industry, organization, and position you are interested in. Every time you submit your resume for a position, you must compare the language and content of the job posting to your resume and adjust accordingly, mirroring your top qualifications to their needs. Don't be afraid to remove items that do not highlight specific relevant and potentially transferable skills, knowledge, and abilities
Accomplishment-driven: Resumes should instantly communicate the value you can bring to an organization. Employers want to know what you can do for them and showing that you were a valuable contributor will entice an employer to want to know more about you. Make sure that your content does not sound like a list of duties but is worded to highlight your skills, using strong action verbs to emphasize your contributions. Thus phrases like "responsibilities included" and "responsible for" should be avoided on your resume.
Polished and well-structured: Be sure to use uniform formatting and standard fonts throughout your document. A successful resume has information in clear and predictable sections to make it the most reader-friendly to hiring managers. Always proofread (and re-read) to ensure your resume is free of typos and grammatical errors. Visually your resume should entice a reader by its clean and professional appearance. Review the visual appeal page for additional information.
Quantifiable: Whenever possible include numbers and metrics to quantify your accomplishments and contributions. An example would be "Created new customer procedures that increased satisfaction rates by 10%". Review the Accomplishment Statement page for more information.
Universally understood: Avoid heavy usage of industry slang and technical terms. Anyone should be able to pick up and understand how you match their desired qualifications.
Source: https://www.brandman.edu/news-and-events/news/2017/08/17/13/04/resume-writing