A CV (curriculum vitae) (most of the times, the term is interchangeable with 'resume') is a document that outlines your education, skills, and experience. It is typically used when applying for academic, research, or scientific positions, as well as for some government jobs and fellowships. Here are some tips for writing a good CV:

1. Keep it brief and to the point: A CV should be no more than two pages long.
2. Use a clear, easy-to-read font and layout: Choose a font that is professional and easy to read, and use headings and bullet points to organize your information.
3. Start with your most recent experience: Begin with your current or most recent job and work backwards. Include the name of the organization, your job title, and the dates of your employment.
4. Focus on your achievements: Use action verbs to describe your responsibilities and highlight your achievements and accomplishments.
5. Use specific examples: Provide specific examples of your skills and experiences, rather than making general statements.
6. Proofread: Make sure to carefully proofread your CV for spelling and grammar errors.

It is generally a good idea to customize your CV for each job opportunity. This allows you to highlight the skills and experiences that are most relevant to the position you are applying for. It can also help you to tailor your application to the specific needs and requirements of the organization.

To customize your CV, start by reviewing the job posting and identifying the key skills and qualifications that the employer is looking for. Then, look at your own education, skills, and experience, and consider how they align with the requirements of the job. Finally, adjust your CV to highlight your relevant skills and experiences, and consider adding a cover letter that explains how your qualifications make you a strong fit for the position.