標(biāo)題標(biāo)簽（title）是最重要的SEO標(biāo)簽，其次是描述元標(biāo)簽（meta description）、標(biāo)題標(biāo)簽（h1-h6）和圖片的alt屬性。① title標(biāo)簽用于告訴搜索引擎頁(yè)面主題，并影響點(diǎn)擊率；② meta description雖不直接影響排名，但能提升點(diǎn)擊率；③ h1至h6標(biāo)簽幫助構(gòu)建內(nèi)容結(jié)構(gòu)并突出重點(diǎn)；④ img標(biāo)簽中的alt屬性提升圖像搜索可見(jiàn)性和可訪問(wèn)性。優(yōu)化這些標(biāo)簽應(yīng)遵循最佳實(shí)踐，如控制字符長(zhǎng)度、合理布局關(guān)鍵詞、確保唯一性和自然融入內(nèi)容中。

Search engines rely heavily on HTML tags to understand and rank content. While no single tag alone can guarantee top rankings, some play a far bigger role than others in signaling relevance and quality to search engines like Google.

Here are the most impactful HTML tags for SEO:

<title></title> — The most important tag for SEO

The <title></title> tag defines the title of a web page and appears in search engine results as the clickable headline. It's one of the first things both users and search engines see.

• Why it matters: Search engines use it to determine what your page is about. A clear, keyword-rich title improves click-through rates and relevance signals.
• Best practices:
  • Keep titles under 60 characters to avoid being cut off in search results.
  • Place primary keywords near the beginning.
  • Make sure each page has a unique title.

Example:

<title>Best Running Shoes for Flat Feet | Top Picks 2024</title>

<meta name="description"> — Influences click-through rate

This tag doesn’t directly affect rankings, but it plays a big role in how many people click through to your site from search results.

• Why it matters: A compelling meta description acts like ad copy. It tells users why they should visit your page.
• Best practices:
  • Keep descriptions around 150–160 characters.
  • Use active language and include relevant keywords.
  • Tailor each description to the page content.

Example:

<meta name="description" content="Discover the best running shoes designed for flat feet. Comfortable, supportive, and tested by experts.">

<h1> through <h6> — Structure content clearly

Heading tags help organize content and show hierarchy. The <h1> is especially important as it usually contains the main topic of the page.

• Why they matter: They help search engines understand the structure and key topics of your content.
• Best practices:
  • Use only one <h1> per page (typically the main title).
  • Use <h2> and <h3 id="code-for-subheadings-to-break-up-text-and-guide-readers-li-li-Include-keywords-naturally-where-appropriate-li-ul-li-ul-p-Example-p-PRE-BLOCK-hr-h-code-alt-code-attribute-in-code-img-src-static-imghw-default-png-data-src-running-shoes-flat-feet-jpg-class-lazy-alt-哪些HTML標(biāo)簽對(duì)搜索引擎優(yōu)化-SEO-的影響最大-code-Makes-images-searchable"> for subheadings to break up text and guide readers.
  • Include keywords naturally where appropriate.

Example:

<h1>Guide to Choosing the Right Running Shoes</h1>
<h2>Understand Your Foot Type</h2>
<h3>Flat Feet and Arch Support</h3>

<alt> attribute in <img src="/static/imghw/default1.png" data-src="running-shoes-flat-feet.jpg" class="lazy" alt="哪些HTML標(biāo)簽對(duì)搜索引擎優(yōu)化（SEO）的影響最大？" > — Makes images searchable

While not technically a tag itself, the alt attribute within the <img src="/static/imghw/default1.png" data-src="running-shoes-flat-feet.jpg" class="lazy" alt="哪些HTML標(biāo)簽對(duì)搜索引擎優(yōu)化（SEO）的影響最大？" > tag helps describe images to search engines and screen readers.

• Why it matters: Images can drive traffic via Google Images, and using descriptive alt text improves accessibility and image SEO.
• Best practices:
  • Use concise, descriptive phrases that reflect the image’s content.
  • Avoid stuffing keywords or leaving it blank.

Example:

<img src="/static/imghw/default1.png"  data-src="running-shoes-flat-feet.jpg"  class="lazy" alt="Top running shoes for flat feet with arch support">

Other helpful tags and attributes

A few other elements also contribute to SEO, though their impact is more indirect:

• <a href=""></a> with good anchor text helps both users and crawlers navigate your site.
• <canonical></canonical> prevents duplicate content issues by telling search engines which version of a page is the main one.
• <header></header>, <footer></footer>, <nav></nav>, and <article></article> help define page structure for better crawling and indexing.

In short, while many HTML tags exist, focusing on <title></title>, <meta description>, heading tags, and image alt attributes will give you the biggest SEO return. These tags are relatively easy to implement and have a direct influence on how well your pages perform in search results.

That’s basically it — not rocket science, but definitely worth getting right.

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