When structuring URLs for a website to improve SEO, it's important to follow best practices to ensure search engines can understand and index your pages effectively. Here are some key considerations:

1. Keep it concise and descriptive: A URL should provide a clear indication of what the page is about. Avoid using generic or irrelevant terms. For example, instead of www.example.com/page1?id=123, use www.example.com/product-name to describe the content.
2. Use hyphens to separate words: Hyphens are preferred over underscores or spaces as word separators in URLs. For instance, www.example.com/my-page is more SEO-friendly than www.example.com/my_page or www.example.com/my%20page.
3. Avoid using unnecessary parameters: If possible, eliminate unnecessary parameters from the URL. For instance, www.example.com/blog?category=technology&page=2 can be simplified to www.example.com/blog/technology/page/2.
4. Include target keywords: Incorporating relevant keywords in the URL can help search engines determine the page's topic. For example, www.example.com/seo-tips is more informative than www.example.com/article-123.
5. Avoid keyword stuffing: While it's important to include keywords, don't overdo it. Keep the URL natural and easy to read for users. For instance, www.example.com/best-seo-tips-for-improving-ranking-in-search-engines is excessive and should be shortened to www.example.com/seo-tips.
6. Consider the URL hierarchy: Organize your URLs in a logical structure that reflects the website's hierarchy. For example, a blog post URL could be www.example.com/blog/category/post-title.
7. Use lowercase letters: To avoid any confusion, it's recommended to use lowercase letters in URLs. Search engines treat uppercase and lowercase letters as different URLs.

By following these guidelines, you can create SEO-friendly URLs that are more likely to be understood and ranked by search engines.

For more information, you can refer to the following resources:

• Google's URL structure guidelines
• Moz's guide on URL best practices
• Yoast's tips for creating SEO-friendly URLs