Cover letters can be tricky to write. The purpose of a cover letter is to highlight a few particular experiences that are pertinent to the job you are applying to. You can even express further interest in that specific company by showcasing your knowledge of their culture or the current events that involves their firm.
In terms of general format, the cover letter should follow some standard guidelines such as one page, single spaced, an appropriate sign off, and a formal heading. As for content, this is where you get to be more creative and take the few paragraphs of space to really communicate why you are the best fit for the position you are applying for. Be sure to showcase your skills, notable accomplishments, your academic coursework and more. Scan over the actual job description to know what technical and soft skills the company is looking for and how you can best position yourself as the ideal candidate.
The key aspect to crafting the perfect cover letter is how you edit and review it. Check out this list of top mistakes and how you can avoid them HERE.