1. What Exactly Is Metadata?
The simplest definition:
Metadata is “data about data.”
Think of a physical book: it has a cover, title, author, blurb, and publication date. None of that is the actual story, but it helps readers decide whether to open the book. Web metadata works the same way—it tells search engines, social platforms, and browsers what your page is about.
2. The Most Important Types of Web Metadata (Must-Fill!)
1. Page Title (Title Tag)
<title>Top 10 Best True Wireless Earbuds to Buy in 2025 | TWS Recommendations</title> - Appears in: browser tabs, search engine results (the big blue headline), and link previews on WeChat/Twitter/etc.
- Recommended length: ≤ 60 characters (Google) or about 30 Chinese characters (Baidu)
- Golden formula: Core keyword + attractive modifiers + brand/site name
