A cover letter is your first introduction to a potential employer, so it needs to show that you are a suitable candidate. A cover letter is an important document that introduces your resume to potential employers and highlights your suitability for the role.
Here is an example of a cover letter:
John Smith
23 Third Street
Sydney
Australia 2001
61 2 233987
john.smith@gmail.com
25th January, 2019
The Human Resources Department
The IBM Corporation
BSL Office Complex
1 Minto Rd
Dhaka
Bangladesh
Dear Sir/Madam,
Attached is my completed application for employment as an IT Engineer, your ref:4567, together with three references, my employment history and copies of my academic certificates, as requested.
Yours sincerely,
(Your signature goes here.)
John Smith
Encl: 6