内容
问答
关于标签、尺寸与预览的具体问题，直接给结论。
2026年4月18日
Why is my OG image not updating?
You replaced the file and the card is still the old image. Stale share images are a cache problem nine times out of ten — here is the order that fixes it.
阅读 →2026年4月16日
Why your favicon is not showing in Google search results
Google needs a square icon in a supported format, declared on the home page and crawlable by Googlebot-Image. Miss any one and the default globe appears.
阅读 →2026年4月11日
Rich results are not showing: a debugging order that works
Valid markup is necessary but not sufficient. Work through eligibility, indexing, visible content and the enhancement reports — in that order.
阅读 →2026年4月10日
Does structured data actually affect rankings?
Structured data is not a ranking factor. It changes how your result can look, how often it gets clicked, and how confidently machines read the page.
阅读 →2026年4月9日
Why is Googlebot blocked when there is no Disallow?
No Disallow rule, yet the page will not crawl or index — usually a CDN or WAF rule, an X-Robots-Tag, a meta robots tag or a robots.txt served as HTML.
阅读 →2026年4月6日
Sitemap index vs sitemap: which one do you need?
A sitemap index lists other sitemaps; a sitemap lists pages. When is an index required, why nesting is banned, and which file to submit to Google.
阅读 →2026年4月3日
How many URLs can one sitemap hold?
A single sitemap file is capped at 50,000 URLs and 50 MB uncompressed. Past that you split with a sitemap index, and how you split matters.
阅读 →2026年3月3日
Do redirect chains hurt SEO?
A chain will not get you penalised, but every hop costs latency and crawl budget. Here is how many hops are too many and when to fix it.
阅读 →2026年2月24日
Why is my new favicon still not showing? (browser cache)
Replacing the file rarely changes what you see. Why browsers cache icons so hard, which cache to clear in each browser, and the one fix that works.
阅读 →2026年2月17日
Why does my OG image not show up on shares?
A card with no image is almost always one of a few causes: a relative path, a stale cache, a blocked file or a rewritten head.
阅读 →