页面 SEO
Canonical 标签
为何重要
The canonical tag tells search engines which URL is the preferred version of a page. Without it, or with a wrong one, duplicate URLs (with parameters, http/https, www) can split signals or the wrong page can be indexed.
如何修复
- Add <link rel="canonical" href="…"> with the full preferred URL on every indexable page.
- Point it at the page itself unless the page is a true duplicate.
- Use only one canonical tag, and keep it the same in the raw HTML and after JavaScript runs.
使用以下工具检查
- Canonical Tag Checker – Check a page’s canonical URL, whether it resolves, and if it conflicts with other signals.
评分：通过的检查获得全部权重，警告获得一半，错误则不得分。 SEO 评分如何运作