A letterhead is a printed heading on the top of a sheet of paper that typically includes the name, logo, and contact information of a business or individual. It is used for official correspondence and helps to establish a professional image. Letterheads can be customized to reflect the branding of the organization, making them an important part of business communication. In addition to the basic information, a letterhead may also include elements like a tagline or a watermark. It is commonly used in formal letters, invoices, and other documents to convey authenticity and credibility. Properly designed letterheads can enhance the overall presentation of written communication.