The more relevant each job, skill or qualification on your CV is to the position you’re applying for, the more detail you should include.
Concentrate particularly on your last two jobs, because these are the ones employers are usually most interested in. Each job entry should state the length of employment, job title, the name of the company and a description of the role. Depending on its relevance to the new position, the nature of each job should be summed up in several sentences or bullet points, with another couple of sentences or points listing any extra duties you performed that would not normally be a part of that role.
You should also mention any relevant projects, products or campaigns that you worked on that are pertinent to the position you’re applying for. Your level of responsibility should be spelled out, as should the number of staff, if any, that you supervised and the size of any budget you may have controlled. Any solid figures relating to your achievements will be helpful. A list of computer programs you are familiar with should also be provided.