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You know, there are tons of sites on the internet which check the value of sites, showing traffic details about sites, seo score checker sites, whois checker sites etc..
Also, some of them are 4-5-6 PR; big sites, for example:
www.websitestatz.com/info/example.com
www.websitevalues.net/example.com.html
Are these links are toxic or not? Should we write them to our disavow file?
Or how can I check if a URL is toxic or not?
No. These and others are not toxic sites. Google knows these kinds of sites very well and discount their links to your site. Often, these links will add a small value to your overall profile, but are considered very low quality none-the-less.
Be careful not to disavow links unless you know that they are toxic. It is a bad practice to disavow links as a rule. Only disavow links as a last resort and only if the links are causing damage to your PR in a significant way.
