A cover letter is a critical part of every job application as it serves as an introduction to yourself and your qualifications. It is typically sent along with a resume, and should complement and add additional information to the information provided in the resume.

Here are some tips for writing a cover letter for a job application:

1. Tailor the cover letter to the specific job and company. Be sure to research the company and the job you are applying for, and make sure to mention specific aspects of the job or company that interest you in the cover letter.
2. Start with a strong introduction. The first sentence of your cover letter should grab the reader’s attention and entice them to read further. Use this space to introduce yourself and explain why you are interested in the position.
3. Highlight your qualifications. Use specific examples from your past experience and achievements to demonstrate how your skills and qualifications match the requirements of the position. It will give a sense that you have done your research on company and position.
4. Show your personality and enthusiasm. Use a friendly and professional tone throughout the cover letter, and be sure to express your enthusiasm for the position and the company.
5. Keep it concise and to the point. Cover letters should be no longer than one page (often less), and should be easy to read and understand. Avoid long-winded sentences and get straight to the point.
6. Include your contact information at the end of the letter. Be sure to include your name, phone number, and email address so the employer can contact you.
7. Proofread your letter. Make sure your cover letter is free of spelling and grammar errors, as this is an indication of your attention to detail and professionalism.
8. If you are sending your CV via email, make sure that the cover letter is part of the email body (not an additional attachment).  Don’t make the reader open extra documents if not necessary.

By following these tips, you will be able to create a strong and effective cover letter that will make a great first impression on potential employers.

It is also worth noting that some companies might be using an ATS (Applicant Tracking System) which is a software that will scan and analyze resumes and cover letters. Make sure your letter contain some of the key skills, keywords, qualifications and experiences as stated on the job advertisement.  This will help to increase your chances of getting through the initial screening process.