DirectWrite is a text layout and glyph rendering API developed by Microsoft. It is designed to improve the quality of text rendering in applications, providing better support for modern typography and complex scripts. DirectWrite allows developers to create high-quality text that looks sharp and clear on various display devices. This API supports features like anti-aliasing, sub-pixel positioning, and advanced text layout capabilities. By using DirectWrite, applications can handle different font styles, sizes, and languages more effectively, enhancing the overall user experience in software that requires text display, such as word processors and web browsers.