Tại sao sử dụng trình tạo meta tag?
Mọi trang web đều cần meta tag. Đó là thông tin đầu tiên Google đọc.
Công cụ này tạo ra gì
Title, meta description, canonical URL, robots, Open Graph và Twitter Cards.
Cách sử dụng các tag này
Sao chép mã HTML và dán vào phần <head> của trang.
Open Graph & Social Media Tags Explained
Open Graph (OG) tags were created by Facebook and are now the standard for social sharing across most platforms. The essential tags are og:title, og:description, og:image, and og:url. Twitter/X uses its own Twitter Card format (twitter:card, twitter:title, twitter:description, twitter:image) but falls back to OG tags when they're absent. For best results, provide both sets — and use an image sized 1200x630 pixels for maximum visual impact on all platforms.
Meta Tag Best Practices
Follow these guidelines to get the most from your meta tags:
- Keep titles under 60 characters — front-load your primary keyword for both SEO and readability
- Write descriptions as ad copy — include a benefit and a call to action within 155 characters
- Set a canonical URL — prevent duplicate content penalties when the same page is accessible via multiple URLs
- Always include an OG image — links shared without images get significantly fewer clicks
- Use unique tags per page — duplicate titles and descriptions dilute your SEO value
Common Meta Tag Mistakes to Avoid
Even experienced marketers slip up. Watch out for these frequent errors:
- Duplicate title tags — every page should have a unique, descriptive title
- Missing OG image — social shares without a preview image are almost invisible in feeds
- Keyword stuffing — cramming keywords into the title or description hurts readability and can trigger Google penalties
- Ignoring mobile truncation — mobile SERPs have tighter pixel limits than desktop; always test both
- Forgetting the canonical tag — without it, search engines may index the wrong version of your page