SparkBrief leverages AI technology, utilizing models like GPT and PaLM, to assist users in generating essays, newsletters, and other content in various tones and objectives. By inputting relevant sources such as news articles or books, users can create tailored content efficiently. Customizable features include word count, speaker selection, tone, and objective setting, making it versatile for different kinds of writing applications. The tool supports multiple output languages and formats, aiming to streamline the writing process for both academic and professional settings.