写作目的用英语描述怎么说

To describe the purpose of writing in English, you can use phrases such as "the aim of this writing is to," "the purpose of this piece is to," or "the goal of this writing is to." For example:
The aim of this writing is to inform the reader about the history of the American Civil War.
The purpose of this piece is to persuade the reader to support stricter gun control laws.
The goal of this writing is to entertain the reader with a funny story about a clumsy cat.