// SEO
Domain authority is a composite score that estimates a domain's overall ranking strength based on factors such as link profile, content quality, and technical health. Different tools calculate it differently, so it is a comparative metric within a single tool rather than a universal standard.
Why it matters: Use domain authority as a rough comparative tool within the same scoring system, not as a precise ranking predictor or a cross-tool benchmark. A lower-authority domain can outrank a higher-authority one for specific queries when its content and relevance are stronger. Focus on building genuine link equity and content quality rather than chasing a single score.