In many contexts, a resume is typically limited to one or two pages of size A4 or letter-size, highlighting only those experiences and qualifications that the author considers most relevant to the desired position. Many resumes contain keywords or skills that potential employers are looking for via applicant tracking systems, make heavy use of active verbs, and display content in a flattering manner.
So the exact purpose of a resume is to summarize your experience, knowledge, and accomplishments. Therefore, you must avoid being too wordy. Say exactly what you mean in the least number of words possible. The length of your resume is important. Resumes should be from 1 to 3 pages long. Don't be tempted to make your resume longer than 3 pages, even if you have a lot to tell. Remember, a resume is supposed to be a summary. A resume that is too long simply will bore the reader.
You have to keep in mind the fact that when you send out a resume it is taking your place and represents you as a person, without the guarantee of securing an interview - and that means your resume can make or break your job prospects before you ever get to speak to someone about it.
But most people wait until a resume is needed and it is at this time that a decision is made to try to refine and update it, or leave it as is and hope that it will be sufficient enough to gain a recruiter or hiring manager's attention. There is a misconception that because resumes are rarely mailed out any longer, they are not that important. Yet many online application forms still request that a resume copy be uploaded for review.
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