Google's Supplemental Index   

To understand Google’s supplemental index, it is important that you understand what a supplemental result is. Supplemental results are almost the same as other web results; however, these results are pulled from Google’s supplemental index. The sites that are used in the supplemental index have fewer restraints than other sites that are included in the main index by Google. There are a variety of parameters that can keep a site from being included in Google’s main index, but these sites still can be allowed into the supplemental index. You may think that you can make the choice of what index your website will appear in, but there is no way that you can change this since the process is automated. The page rank of your site will not be affected either by what index your site is included in.

While there are no real ways to decide whether your site and its’ pages will be in the supplemental index or the regular index, there are some steps that can help you avoid being put into the supplemental index in the first place. If you have a site that is low quality, difficult to crawl, and has content that is not unique, more than likely you will end up in the supplemental index. Although you cannot really influence which pages on your site may be affected by that, there are some precautions you can take to avoid your pages being listed on the supplemental index of Google. Quality is the most important thing. If you have duplicate content or the site is hard to index, you will probably end up in this supplemental index. It is important to note that using software to rewrite PLR articles will not improve your content and will probably get your site listed on Google’s supplemental index.

You may be wondering why so many pages of sites end up in the Supplemental Index of Google. The following are a few reasons that they arrive in the supplemental index.

1. The same title and META tags are used for multiple pages on one site.
2. Content that is not unique.
3. Various unrelated links on your pages
4. Crawling problems that include java script navigations, too many parameters used in the URL, or redirect problems.
5. The web page does not exist any more or it is orphaned.

There are some things that you can do to keep the pages on your website from ending up on Google’s Supplemental Index.

1. Rewriting 30-50% of PLR content you use
2. Get rid of duplicate content from your site and keeping your content unique and fresh/
3. Avoid overcomplicating the structure of the site or the system for navigation.
4. Keep URLs short and simple
5. Increase your inbound links but keep them relevant.
6. Keep deep linking to 2-3 levels.
7. Submit a sitemap to your site to Google.
8. Keep your domain name appearing consistent.

While these are not all the things you can do to avoid being a part on Google’s Supplemental Index, they are definitely a great place to get started to ensure the success of your site.