You can use a letter any time you need to convey a formal or informal message to a person or organization. Letters are useful for making requests, providing information, expressing gratitude, extending invitations, submitting applications or proposals, offering promotions or opportunities, giving condolences, and addressing issues or disputes.
On the personal side, letters are used to correspond with friends and family, send invitations to parties, and more. In business, letters are more commonly used to communicate with partners, clients, customers, suppliers, employees, and other stakeholders. They are also used to establish business agreements, initiate contracts, and inform recipients of legal actions, among other purposes.
Letters are one of the oldest and most effective means of written communication, and they are still used by just about every institution and industry today. As such, it’s useful to know how to use them effectively and efficiently.