Your CV will probably be read first by recruitment agents, or human resources staff and not the person you would work for. Therefore you must aim to get past these people to stand any chance of being interviewed. These people may have hundreds of CVs to look through. Their task will be to filter all the received CVs down to only a handfull to pass on to the hiring manager. They look for any excuse to reject your CV - don't give them any chance to do this.
The recruitment agent or human resource person will not read three pages of dense text to find out if you are suitable. They may have 200 CVs to skim for one position, and will also be recruiting for other positions. Their first task is to cut the CVs down to a managable number for detailed analysis. You must convince them you are a possible candidate within a few lines and easily scanned highlights.
Imagine a scenario where your CV is lying in a pile of ten CVs. How can you avoid the bin?
Remember that the person interviewing may not be the person who has chosen the candidates for interview, and may not have much time to read your CV before the interview. Sometimes CVs are passed by human resources to the interviewer only hours or minutes before the interview.
The cover letter can get you rejected, even if you are a strong candidate. Make sure that the cover letter puts you in the pile for further consideration.
your CV should: