How Do Referring Domains Influence SEO? Let’s dig into the differences between helpful and hurtful referring domains:What Makes a Referring Domain High Quality? Now, look at “Referring Domains” and “Analyzed Backlinks” and evaluate:Their total numbersTheir ratioIn this case, this website has a lot of referring domains and backlinks. Head over to the referring domain’s website and ask yourself: Is this website topically relevant to mine? Get More Referring Domains with SemrushGaining backlinks from new, authoritative referring domains will strengthen your backlink portfolio.