URL structure ảnh hưởng SEO thế nào? Best practices?

URL là signal nhẹ cho Google hiểu nội dung, nhưng ảnh hưởng CTR đáng kể vì user đọc URL trước khi click — URL xấu mất click dù rank cao.

Best practices:

1. Ngắn gọn, descriptive: /blog/react-query-tutorial tốt hơn /blog/post?id=123
2. Dùng hyphens (-) ngăn cách từ, KHÔNG dùng underscores (_) — Google coi hyphen là word separator, underscore không
3. Lowercase only — /About và /about là 2 URLs khác nhau (duplicate content)
4. Tránh parameters khi có thể — /products/shoes tốt hơn /products?category=shoes

1. Tránh thay đổi URL — nếu bắt buộc, 301 redirect URL cũ → mới
2. Include keyword target — nhưng tự nhiên
3. Tránh nested quá sâu — /a/b/c/d/e/page kém hơn /a/page

Trong Next.js: file-based routing tạo clean URLs tự động.

URLs are a lightweight ranking signal but have significant CTR impact since users read URLs before clicking — an ugly URL loses clicks even when ranking high.

Best practices:

1. Keep them short and descriptive: /blog/react-query-tutorial is better than /blog/post?id=123
2. Use hyphens (-) to separate words, NOT underscores (_) — Google treats hyphens as word separators, underscores do not
3. Lowercase only — /About and /about are two different URLs (duplicate content)
4. Avoid query parameters when possible — /products/shoes is better than /products?category=shoes

1. Avoid changing URLs — if unavoidable, use a 301 redirect from old to new
2. Include target keywords — but keep it natural
3. Avoid deep nesting — /a/b/c/d/e/page is worse than /a/page

In Next.js: file-based routing generates clean URLs automatically.