Alt Text

A text description of an image for accessibility and SEO, displayed when the image cannot be loaded.

技术细节

Alt Text directly influences click-through rates from search results. Google typically displays the first 50-60 characters of a title tag and 150-160 characters of a meta description, though it may rewrite descriptions based on query relevance. Each page should have a unique title containing primary keywords near the beginning. The meta description acts as ad copy — it doesn't directly affect rankings but affects whether users click. Open Graph (og:) and Twitter Card meta tags control social media previews separately from search results.

示例

```html
<head>
  <title>PDF Merge Tool — Combine PDF Files Free | Peasy</title>
  <meta name="description" content="Merge multiple PDF files into one document. Free, no upload required — runs entirely in your browser. Drag and drop to reorder pages.">
</head>
```

相关术语

Plain Text Rich Text Normalization (Text) Text Wrap Balance SERP Canonical URL Hreflang Schema Markup JSON-LD Rich Snippet Crawl Budget Robots.txt Sitemap XML Meta Description Title Tag Backlink Internal Linking Anchor Text Core Web Vitals LCP CLS IndexNow Noindex 301 Redirect Keyword Density Open Graph Breadcrumb E-E-A-T YMYL Core Update Helpful Content Topical Authority Entity SEO Knowledge Panel Featured Snippet People Also Ask Local Pack Rendering Budget Edge SEO Log File Analysis INP Page Experience TTFB Domain Authority Long-Tail Keyword Nofollow Duplicate Content Pagination SEO Knowledge Graph Orphan Page Search Intent Passage Ranking

Categories

技术细节

示例

相关工具

相关术语