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This tag is automatically added to all the links, both internal and external, that you want to open in a new tab. Although it seems very intrusive, it isactually a security measure to prevent malicious links from taking control of an open tab. It's not advisable to delete the rel = "noopener" of your posts .It doesn't affect the SEO, it does not have any impact on the different analysis tools and neither the affiliate links are affected. The only thing it does is to protect your users from possible malicious links that can hijack your tabs.