What is Spam Score & its significance in SEO

What is Spam or Spamdexing?

In today’s digitized world, spamdexing (also known as search engine spam, search engine poisoning, black-hat search engine optimization (SEO), search spam, or web spam) is the cautious misuse of search engine indexes. It involves various methods (link building and repeating unrelated phrases) to manipulate the significance of resources indexed.

Major search engines like Google, check for instances of spamdexing. Also, search-engine operators can block the results from entire websites that use spamdexing. 

Google Fighting Spam
Google Fighting Spam

Using unethical methods to increase the ranking of the website is called “black-hat SEO“. Methods that violate search-engine-promotion rules and guidelines are not unacceptable. Additionally, the wrongdoers run are penalized by the Google Panda and Google Penguin search results ranking algorithms. 

Every professional should ensure that their website is not pierced with ‘spam backlinks’.

Spammy backlinks can do more harm than good. Too many spam backlinks can lead to penalties by Google, getting deindexed and losses in search engine rankings. 

What is a Spam Score?

Spam Score is a metric introduced by Moz indicate how spammy a domain or subdomain is. It is developed by company’s Director of Data Science, Dr. Matt Peters.

You can check Spam Score of your website in the Link Explorer tool of Moz.

Moz Link explorer
Moz Link Explorer

Spam score metric can be assessed through MOZ link explorer to identify sites that have identical trait to the site a user is researching, which we’ve found to be penalized or banned by Google. It relies on machine learning model Which identifies analogous traits among the million of prohibited sites based on feeded data.

1%-30% score is considered – Low Spam Score.

31%-60% score is considered – Medium Spam Score.

61%-100% score is considered – High Spam Score.

The Signals of Spam Score

1.      Low MozTrust to MozRank Score

 MozTrust and MozRank scores are the two important metrics used by Moz to determine the credibility of a website. If a website has a low MozTrust score in comparison to its MozRank score, there is a high chance of it being spammy. 

2.      Large Site with few links

 If a site has many pages, but few links, it means that the content on the website is not useful. Therefore, these pages are not worth linking and thus considered spam.

3.      Ratio of do-follow vs no-follow links

 The ratio between dofollow vs nofollow links is important. If inbound do-follow links of a site are higher than no-follow links, then the site may not be earning those links naturally.

4. Minimally branded anchor texts in inbound links

 Using specific keywords as anchor texts will not be helpful for your page ranking. There should be a balanced ratio of different types of anchor texts to ensure that the links are optimized well. 

5.      Thin content

 Providing top-quality content is of utmost importance. The search engine is ensuring that users get the best results for their queries. Visitors look for in-depth and reliable content.

6.      Small site markup

 Site markup consists of JavaScript, CSS, and Schema. Site markup enhances the experience of the user. Sites with little markup such as basic HTML, poor structure, a heavy page with a little formatting, and low-quality graphical elements are clear signs of spam.

7.      Low number of internal links

 Internal links help users stay longer on a website, giving them a meaningful experience. Less internal links may be marked as spam.

8.      No contact information

 Well-established sites always have contact information. This helps the user correspond with the administrator.

9.      Low number of pages

 Websites with few pages are considered spam. That does not mean you have to create hundreds of pages. Rather meaningful and valuable content is important.

10.  Length of domain name

 Short, simple, and straightforward domain names are advisable. Otherwise, it can be considered spammy. The maximum limit of characters for domains to be considered spammy is 63. 


To conclude, spam score is a simple and straightforward concept, but an important factor in the SEO strategy. Even the slightest of things can have a negative in your overall ranking. 

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