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# SEO - Search Engine Optimization * * * Have you ever used a search engine? Do you know what the major search engines are today? This article lists currently popular search engines. * * * ## SEO - Search Engine Optimization Search Engine Optimization (SEO) is the process of improving a website's ranking (visibility) in search engines. A good ranking in search engines helps a website attract more traffic. SEO primarily studies how search engines work, who performs searches, and what search keywords they use. Optimizing a website may involve editing content to increase keyword relevance. Promoting a website can increase the number of external links pointing to it. SEO requires modifying a website’s HTML source code and its content. SEO strategies should be incorporated into website development from the outset—especially regarding menu and navigation structure. Broadly speaking, any techniques involving deception or questionable methods fall under “Black Hat SEO.” Examples include spam links, hidden pages, doorway pages, and keyword stuffing. “Black Hat SEO” refers to deceptive practices that violate mainstream search engine guidelines. Its main characteristic is delivering quick, short-term gains through unethical methods. However, such tactics risk penalties whenever search engine algorithms change. There is no precise definition distinguishing “White Hat SEO” from “Black Hat SEO.” Broadly speaking, all deceptive or suspicious techniques qualify as Black Hat SEO—for example: hidden pages, keyword stuffing, spam links, doorway pages, etc. * * * ## Submitting Your Website to Search Engines Most major search engines provide official submission interfaces. You can submit your site via these entry points so search engines can promptly crawl and index your data. * 360 Search Submission Portal: [http://info.so.360.cn/site_submit.html](http://info.so.360.cn/site_submit.html) * Baidu Search Site Submission: [http://www.baidu.com/search/url_submit.html](http://www.baidu.com/search/url_submit.html) * Baidu Single Page Submission: [http://zhanzhang.baidu.com/sitesubmit](http://zhanzhang.baidu.com/sitesubmit) * Google Site Submission: [https://www.google.com/webmasters/tools/submit-url?hl=zh-CN](https://www.google.com/webmasters/tools/submit-url?hl=zh-CN) * Google News Content Submission: [http://www.google.com/support/news_pub/bin/request.py?contact_type=suggest_content&hl=cn](https://www.google.com/support/news_pub/bin/request.py?contact_type=suggest_content&hl=cn) * Bing (Bing) Page Submission: [http://www.bing.com/toolbox/submit-site-url](https://www.bing.com/toolbox/submit-site-url) * Sogou Site Inclusion Submission: [https://zhanzhang.sogou.com/](https://zhanzhang.sogou.com/) * SOSO Site Inclusion Submission: [http://www.soso.com/help/usb/urlsubmit.shtml](http://www.soso.com/help/usb/urlsubmit.shtml) * Yahoo China Site Submission: [http://search.help.cn.yahoo.com/h4_4.html](http://search.help.cn.yahoo.com/h4_4.html) * NetEase Youdao Search Submission: [http://tellbot.youdao.com/report](http://tellbot.youdao.com/report) * MSN Bing Site Submission: [http://cn.bing.com/docs/submit.aspx?FORM=WSDD2](https://cn.bing.com/docs/submit.aspx?FORM=WSDD2) * Alexa Site Submission: [http://www.alexa.com/help/webmasters](http://www.alexa.com/help/webmasters) More webmaster tools: [ Typically, you must enter the full URL of your website, including the `http://` or `https://` prefix. Example: [ You only need to submit your site’s homepage—the search engine will discover other pages by following links on your site. You may also add meta descriptions and keywords to your webpages, but don’t expect them to significantly impact your rankings. Search engine indexes are updated periodically. If your site changes or pages are removed, search engines will update and clean their indexes accordingly. Not all