While not always mandatory, a cover letter is strongly recommended for Data Analyst applications. It offers the opportunity to elaborate on your skills and experiences, particularly those that might not be immediately apparent from your resume. In your cover letter, you can discuss specific projects or challenges you’ve tackled, elaborate on your analytical approach, and convey your enthusiasm for data analysis and how it can drive business outcomes. A well-crafted cover letter can make a significant difference, especially when applying for roles where your technical expertise and problem-solving skills are crucial.