usabilitybydesign.com
贵阳赖俊智能硬件开发有限公司
3 failed · 10 warnings · 16 passed
Audited Sun, 12 Jul 2026 02:00:42 GMT · https://usabilitybydesign.com/
Meta & Head
18.1/25
Title, description, canonical, social tags — what search engines read first.
Open Graph tagsmedium impactlow effort
No Open Graph tags found
Open Graph tags control how your page looks when shared on Facebook, LinkedIn, Slack, WhatsApp, and most chat apps; without them, links render as a bare URL or with guessed text, and far fewer people click through. Add four meta tags to <head>: og:title, og:description, og:url, and og:image — an image around 1200x630 pixels works well across platforms. Use absolute https:// URLs for og:image and og:url; relative paths are the most common reason preview images silently fail to appear.
Title taghigh impactlow effort
<title> is "贵阳赖俊智能硬件开发有限公司" (14 characters)
Search engines truncate titles past roughly 60 characters and often rewrite very short or vague ones, so the message you wrote may never actually be shown. Rewrite the title to 30–60 characters that lead with the primary keyword and end with your brand, e.g. "Merge PDF Files Online Free | YourBrand". Front-load the important words, since truncation always cuts from the end. Don't pad a short title with repeated keywords just to hit the range — clarity wins clicks, not length.
Canonical URLmedium impactlow effort
No <link rel="canonical"> found
When the same page is reachable at several URLs — tracking parameters, trailing-slash variants, http vs https — search engines may split ranking signals across the duplicates. A canonical tag names the one version that should get all the credit. Add <link rel="canonical" href="https://www.example.com/page/"> to the <head>, pointing at the page's preferred absolute URL. Double-check it's self-referencing on the primary version: a canonical that points at the wrong page can quietly de-index the right one.
Twitter card taglow impactlow effort
No twitter:card meta tag found
X (Twitter) layers its own card markup on top of Open Graph, and without a twitter:card tag your shared links may render as plain text instead of a large image preview. Add <meta name="twitter:card" content="summary_large_image"> alongside your Open Graph tags; X will fill in the title, description, and picture from og:title, og:description, and og:image. Keep og:image an absolute URL — a relative or missing image is the usual reason cards show up without a picture.
5 passing checks
- Meta descriptionMeta description is "贵阳赖俊智能硬件开发有限公司致力于创新与技术的融合，专注于智能硬件的研发与制造。我们拥有一支高素质的研发团队，凭借丰富的行业经验和前沿技术，推动智能家居、可穿戴设备等产品的不断优化。公司坚持质量至上，致力于为客户提供高性能、高性价比的智能产品，提升用户生活品质。欢迎了解我们的最新产品与技术，共同探索智能未来！" (155 characters)
- Viewport meta tagViewport is "width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
- Character encoding declaredCharacter encoding is declared
- FaviconA <link rel="icon"> is present
- Page allows indexingNo restrictive robots meta tag
Content & Structure
12.5/25
Headings, copy depth, images, structured data, internal linking.
Single H1 headinghigh impactlow effort
0 h1 headings found
The h1 is the visible headline of the page and one of the clearest signals to search engines of what it's about; with none present, engines lean on surrounding text and may misread the topic. Add exactly one h1 near the top that states the main topic in plain language and includes the primary keyword, e.g. <h1>Merge PDF Files Online</h1>. Don't fake it with a styled <div> — the semantic tag itself is what crawlers and screen readers actually read.
Image alt textmedium impactlow effort
9 of 69 images have alt text
Alt text is how search engines understand what an image shows — it feeds image-search rankings and is what screen readers announce to blind visitors. Add a short, specific alt attribute to every meaningful image, describing the content rather than listing keywords: alt="Golden retriever puppy playing in snow" beats alt="dog puppy pet animal". Give purely decorative images an empty alt="" instead of omitting the attribute, so assistive technology knows to skip them rather than reading out the filename.
Word counthigh impactlow effort
359 words of visible text
With only a few hundred words, this page gives search engines little to index and often loses to more thorough competitors targeting the same query. Expand it toward 600+ words of genuinely useful material: answer the questions visitors arrive with, and add examples, specifics, an FAQ section, or step-by-step detail. Don't pad with fluff or repeat keywords to hit a number — length should be a byproduct of covering the topic properly, never the goal itself.
Structured data (JSON-LD)medium impactmedium effort
No JSON-LD structured data blocks found
Structured data makes your listing eligible for rich results — star ratings, FAQs, breadcrumbs, product prices — which occupy more space on the results page and draw more clicks than plain blue links. Add a <script type="application/ld+json"> block with a schema.org type that matches the page: Organization or WebSite for a homepage, Article for posts, Product for product pages. Only mark up content actually visible on the page — markup for invisible content violates Google's guidelines and can earn a manual action.
Heading hierarchylow impactlow effort
Heading level jumps from h3 ("制造业工程解决方案服务商") to h5 (" -制造业工程解决方案服务商-")
Headings form the page's outline; when levels jump (h2 straight to h4), search engines and screen readers get a broken table of contents and the relationship between sections turns ambiguous. Fix the jump by stepping down one level at a time — promote the deeper heading, or add the missing intermediate level. The usual cause is choosing heading tags for their default font size; set sizes in CSS instead and let the tags reflect actual document structure.
3 passing checks
- HTML lang attribute<html lang="zh-CN">
- JavaScript-dependent contentvisible text ~33791 chars in the initial HTML
- Internal linking55 internal, 0 external links
Technical
20.5/25
HTTPS, redirects, robots, sitemap, speed, crawlability.
Fast time to first bytehigh impactmedium effort
896 ms
Time to first byte is the floor under every other speed metric — the browser can't parse, render, or fetch anything until the first byte arrives, so a slow TTFB drags down all Core Web Vitals and tests crawlers' patience. Add caching in front of the origin: full-page caching at a CDN (Cloudflare, Fastly) helps most, followed by server-side caches (Redis, object caching) and indexes on slow database queries. Measure from locations near your actual users — tuning only your fastest region leaves distant visitors just as slow.
robots.txt present and permissivemedium impactlow effort
no robots.txt found
Without a robots.txt, crawlers assume everything is allowed — not fatal, but you lose the ability to keep them out of low-value areas (internal search results, carts, admin paths) and the standard place to advertise your sitemap. Create a plain-text robots.txt at the site root with at least a "User-agent: *" line and "Sitemap: https://www.example.com/sitemap.xml". Don't use it to hide sensitive URLs, though — the file is public, and disallowing a page doesn't remove it from the index; use noindex or authentication for that.
XML sitemap availablemedium impactlow effort
no sitemap.xml found
Without an XML sitemap, search engines discover pages only by following links, so new, deep, or weakly linked pages get found slowly or not at all. Generate one at /sitemap.xml — most frameworks and CMSs have a generator built in or as a plugin — listing every canonical, indexable URL, then add "Sitemap: https://www.example.com/sitemap.xml" to robots.txt and submit it in Google Search Console. Keep it clean: listing redirected, noindexed, or 404 URLs erodes crawler trust in the whole file.
Response compression enabledlow impactlow effort
no content-encoding header
This HTML is served uncompressed, so every visitor downloads far more bytes than necessary — text compresses extremely well, and the savings directly speed up first render on slow connections. Enable Brotli or gzip on your server or CDN: in nginx it's "gzip on;" (or the brotli module), in Apache it's mod_deflate via .htaccess, and on most CDNs it's a single toggle. Make sure compression covers all text types (HTML, CSS, JS, JSON, SVG), but skip already-compressed images — recompressing them wastes CPU for no gain.
8 passing checks
- Served over HTTPSfinal URL uses https://
- HTTP redirects to HTTPShttp:// redirects to https://
- No mixed content0 http:// subresource references
- Short redirect chainno redirects; URL resolves directly
- Reasonable HTML size71.4 KB
- Missing pages return 404missing paths return HTTP 404/410
- www and non-www resolve consistentlywww and non-www converge on the same host
- HTML5 doctype<!DOCTYPE html> present
Performance
Core Web Vitals scoring via Google PageSpeed is coming soon.
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