How does a copy page form?

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Copying a Web page (or a duplicate content page) refers to two or more pages with the same content or very similar.

In general, search engines do not like to copy content pages, they will try to determine which is the original version, and then ignore the other replication pages.

There are two points worth noting:

1 copy of the Web site is not a percentage of judgment. For example, a Web page with 60% or 80% of the content and other pages of the same, is listed as a copy of the page, if there is a ratio that is much simpler.

2. Copying Web pages does not bring penalties. Search engines will lose other copy pages, but will not penalize the search engine's original provenance.

But it is possible to punish the original source. For example, search engine judgment error, the original source as copied, and copy as the original source.

There are general possibilities for replicating content Web pages:

1 The problem of Web site normalization arises.

2 The websites of agents and retailers often copy product information from the product manufacturer's website. This is nothing wrong, general product manufacturers also agree, but most agents, retailers, wholesalers will be directly copy, without making changes. So these e-commerce sites are flooded with copies of content pages.

3 print version. Many web sites offer a more printable version, and if the robots.txt file is not used, the printed version of the page may become a replicated page.

4 The content of the Web page is generated by RSS. There are many websites, especially news websites, are using the RSS feeds of other websites to generate the content of the website, which has already appeared on the original source and many other websites.

5 e-Commerce website uses session ID. Search engine spiders at different times to visit the page, was given a different session ID, but in fact the content of the Web page is the same. However, because the session ID parameter is different, it is treated as a different Web page.

6 The content of the Web page is too small. It is inevitable that there are common parts on every page, such as navigation bars, copyright notices, and so on. If the body part of a Web page is too small to be able to reach these common parts, it is possible to be considered a replicated Content Web page.

7 article copy reprint and so on. Sometimes other people copied your website content, sometimes it is a kind of reprint, sometimes the author volunteered to different sites to send articles, these are likely to cause replication content pages.

8 Mirror Image website. Mirror website used to be very popular, when a website is too busy and too slow, users can look for content or download by replacing the mirror, which also causes the risk of copying content pages.

9 The difference between the product or service type is relatively small. Some sites, for example, classify their products or services by region, but the products or services provided to each area are actually the same. On these pages, which are classified by region, only the names have been changed, and everything else is the same.