Meaning: When you read, you are exposed to different writing styles and techniques, which can help you improve your own writing.
Choice of Words: "Reading" is the process of looking at and understanding written or printed words. "Makes" means to cause something to happen or exist. "Better" means of a higher quality or standard. "Writer" is a person who writes. When you put these words together, you get the idea that reading can help you improve your writing skills.