Domain Authority is important as a comparative metric, not as a ranking signal. Google doesn't use Moz's DA score in its algorithm. What matters are the actual signals DA tries to predict: your backlink profile's quality and quantity, how authoritative sites link to you, content depth, and technical SEO fundamentals. A DA of 40 versus 25 suggests the first site likely has stronger link equity, but it doesn't guarantee better rankings for any specific keyword. The score moves slowly and reflects historical link building more than recent changes. You can rank competitively with a lower DA if you target the right keywords, build topical authority in your niche, and earn relevant links. We've seen DA 30 sites outrank DA 50 competitors in local Ottawa markets because they had better on-page optimization and local citations. Conversely, a high DA from old, irrelevant links won't save thin content. DA becomes useful in three scenarios. First, when prospecting link opportunities—a DA 60 backlink typically passes more equity than a DA 20 one, though relevance matters more. Second, for competitive benchmarking—if your DA is 28 and competitors average 45, you know link building is a priority. Third, for portfolio management across multiple domains, DA gives a quick health snapshot. The risk is over-optimization. Some agencies sell "DA boosting" through spammy link schemes, which can trigger penalties even if the score rises temporarily. Google cares about natural link growth from relevant, authoritative sources. We track DA monthly for our 500-domain portfolio, but decisions are based on organic traffic trends, ranking movement, and referring domain quality from Ahrefs or SEMrush. Treat DA like your credit score—a helpful indicator of underlying health, not the goal itself. Build links that make sense for your audience and niche. The DA will follow, and more importantly, so will your rankings and traffic.