The article discusses essential HTML tags that are crucial for ensuring proper rendering and functionality in web browsers. It emphasizes the importance of including the `<!doctype html>`, `<html lang="en">`, `<meta charset="utf-8">`, and `<meta name="viewport" content="width=device-width,initial-scale=1.0">` tags to avoid common pitfalls and enhance the performance of websites across different devices and technologies. The author shares personal insights and examples to illustrate the impact of these tags on web development.