2022搜索引擎工作原理详解及谷歌推广备案指南
前言：通过《SEO新手入门系列2022（二）：SEO 101》这篇文章已经简单的介绍了什么是SEO和搜索引擎。本文将详细解析搜索引擎的工作原理。
Introduction: The article "SEO Beginner Series 2022 (Part 2): SEO 101" briefly introduced what SEO and search engines are. This article will explain the working principles of search engines in detail.
搜索引擎的工作流程主要分为三个关键步骤：
The working process of search engines mainly consists of three key steps:
1. 网页抓取（Crawling）
1. Web Crawling
搜索引擎会派出"蜘蛛"程序（Spider），通过URL链接不断抓取互联网上的新内容。这些内容可能是网页、PDF、MP3等各种格式的文件。
Search engines send out "spider" programs to continuously crawl new content on the internet through URL links. This content may include web pages, PDFs, MP3s and other file formats.
2. 建立索引（Indexing）
2. Indexing
搜索引擎会对抓取的内容进行分类和索引，存储在其庞大的数据库中。这个过程涉及复杂的算法和社会学研究等多方面因素。
Search engines classify and index the crawled content, storing it in their huge databases. This process involves complex algorithms, sociological research and other factors.
3. 排名显示（Ranking）
3. Ranking
当用户输入查询时，搜索引擎会从其索引库中快速检索相关内容，并根据相关性和其他参数进行排序展示。
When users enter queries, search engines quickly retrieve relevant content from their index libraries and display it sorted by relevance and other parameters.
如何检查网站是否被收录？
How to check if a website is indexed?
您可以使用site:yourdomain.com命令在Google搜索中查看。例如：site:www.seozen.top可以显示当前被收录的页面数量。
You can use the site:yourdomain.com command in Google search. For example: site:www.seozen.top can show the number of currently indexed pages.
网站未被收录的可能原因：
Possible reasons why a website is not indexed:
- 新网站尚未被收录
- New website not yet indexed
- 缺乏外部链接
- Lack of external links
- 网站结构过于复杂
- Overly complex website structure
- 存在阻止爬虫的代码（如noindex）
- Presence of code blocking crawlers (such as noindex)
- 网站受到搜索引擎处罚
- Website penalized by search engines
关于robots.txt：
About robots.txt:
通过robots.txt文件，您可以告诉搜索引擎哪些内容不需要抓取，比如重复页面、搜索参数等，这有助于搜索引擎更好地理解您希望展示的主要内容。
Through the robots.txt file, you can tell search engines which content should not be crawled, such as duplicate pages, search parameters, etc. This helps search engines better understand the main content you want to display.
谷歌推广备案问题：
Google promotion filing issues:
在中国大陆进行谷歌推广是否需要备案，主要取决于推广的具体形式和投放渠道。一般来说：
Whether filing is required for Google promotion in mainland China mainly depends on the specific form and channels of promotion. Generally:
- 如果是通过Google Ads投放广告，不需要额外备案
- If advertising through Google Ads, no additional filing is required
- 如果是建立中文网站进行SEO推广，建议按照中国法规进行ICP备案
- If establishing a Chinese website for SEO promotion, it is recommended to complete ICP filing according to Chinese regulations
- 使用香港或海外服务器可以免备案，但可能影响国内访问速度
- Using Hong Kong or overseas servers can avoid filing but may affect domestic access speed
安岳地区专业的SEO推广公司建议：如果您主要面向国际市场，可以直接使用Google Ads进行推广；如果同时兼顾国内市场，建议网站进行ICP备案以获得更好的本地搜索表现。
Professional SEO promotion company in Anyue recommends: If you mainly target international markets, you can directly use Google Ads for promotion; if also targeting the domestic market, it is recommended to complete ICP filing for better local search performance.
