Seeo Blog Google Index Supplemental


06 Dec, 2019

What Is Google's Supplemental Index and How to Avoid It?

Google's supplemental index is an additional search engine index that may include some of your website's pages. In this case, users won't see some pages of the site in the SERP. This, of course, negatively affects the promotion of the platform.

What Are Supplemental Results

The Google database includes the main index and the supplemental one, where the pages that are not important from the search engine's perspective are placed. Google is committed to the quality of search results and in most cases adds only useful, informative, and unique pages to the main index. When search engine algorithms evaluate any page of a site as of little value for the main index, it goes to additional - supplemental results.

If there are pages that fall under this filter, the message "In order to show you the most relevant results, we have omitted some entries very similar to the ones already displayed" is displayed at the end of the main index.

Why Your Page Might Be Placed in the Supplemental Index

  1. Duplicated content - unoriginal text is the main reason why some pages go to supplemental results, since Google operates the Panda filter, which restricts low-quality content. This takes into account duplicates within the site, so all non-unique pages should be disallowed from being indexed in the robots.txt file.
  2. Incorrect site structure with more than four levels of nesting for some of the pages.
  3. Links to questionable websites - the ones that were filtered or banned by Google.
  4. Improper internal linking, resulting in low weight.
  5. Low trustworthiness of the entire platform associated with a low-quality link profile - links from suspicious and spammy sites.
  6. Texts that are too short or filled with spam, the use of auto-generation and auto-translation, resulting in an unreadable and uninformative page.
  7. The subject of the page is very different from the other content.
  8. There are no title and description tags or they are not unique.

How Does Google's Supplemental SERP Impact the Progress of Your Project

Pages that fall into the supplemental index are not displayed in the main Google search results and do not attract visitors to the site. Only for very rare queries for which there are no results in the main index, it is possible to display supplemental pages.

Keywords from the keyword list added to such pages will not attract traffic from Google.

If the site has many pages in the supplemental index, this negatively affects the overall ranking of the resource. For successful project promotion, it is important to minimize the number of pages in supplemental search results.

How to Remove Pages from Google's Supplemental Results

To do so, proceed as follows:

  1. Edit content in accordance with recommendations from Google - make it unique, structured, useful, and competent. Work on meta tags - they must be unique and informative as well.
  2. Think over the structure of the website so that it has three to four levels of nesting.
  3. Use the rel = canonical tag to indicate to the search engine the preferred canonical page for indexing.
  4. Disallow unimportant and technical pages (for example, authorization, filter and product sorting pages, system files) from being indexed in the robots.txt file.


In this article, we discussed what Google's Supplemental index is - it's an additional search engine index. These results are displayed right after the main index and can be accessed by clicking the "Show hidden results" link.

Pages in the supplemental index negatively affect promotion and in most cases do not allow traffic to the website.

To remove pages from supplemental results, it's necessary to monitor the quality of content, internal and external links, and ensure that web pages comply with recommendations from Google.

Do you like the article? Share with friends
Rate Us!

comments powered by HyperComments

Similar Articles

SERP checker vs SERP tracker: main differences

SERP checker vs SERP tracker: main differences

Taras 7 Jan, 2021

What is the difference between SERP checkers and SERP trackers? Let’s take a look at the popular services for SERP checking and tracking and find out

TOP 7 Ranking Factors to Get Your Website on the First Page of Google in 2021

TOP 7 Ranking Factors to Get Your Website on the First Page of Google in 2021

Marina 23 Oct, 2020

So are you ready to make 2021 the best year in your SEO career? Into account while executing your SEO strategy in 2021, use an SEO competitor rank tracker tool to rinse and repeat your small wins, and you are going to leave your competitors in the dust landing the long-awaited 1st page of Google.

The best website analyzer to take your resource to the new level and find all drawbacks

The best website analyzer to take your resource to the new level and find all drawbacks

Marina 24 Sep, 2020

Benefits of SEO analyzer by SpySERP and quality software – efficient scanning pf all pages including website review. High-quality page check with a free tracker - anything is possible!