What Is Google Ranking Factors 2019 Moz and Why It Matters for Agencies

In 2019, Moz released their biennial survey on Google's ranking factors, which remains one of the most cited research efforts in the SEO industry. This study surveyed hundreds of SEO professionals and correlated their expertise with actual ranking data to identify which factors most strongly correlate with higher Google rankings. The 2019 version built on years of prior research and included updated insights on how Google's algorithm had evolved, particularly around link quality, domain authority, and user experience signals. Rather than claiming to reveal Google's exact algorithm, the survey presented correlations between certain website characteristics and ranking success, providing a data-backed framework that professionals could use to guide their strategies.

For agencies and web designers, understanding this research matters because it gives you credibility and direction when advising clients. Instead of following SEO trends that disappear in six months, you can point to peer-reviewed survey data that shows which factors actually move the needle. The 2019 findings reinforced that links remain the strongest ranking factor, but also highlighted the growing importance of page-level factors like keyword usage in titles and descriptions, content quality, and site architecture. This helps you prioritize your efforts and client budgets toward activities with the highest probability of impact. When a client questions why you're focusing on link building instead of keyword density, you have research to back your recommendation.

Practically speaking, you can use this data to structure your audits and proposals. Start by evaluating a client's current performance against the top-ranked factors from the survey: domain-level link authority, page-level link authority, title tag optimization, and content relevance. During an audit, explicitly reference which factors they're weak on and explain why those gaps hurt their rankings. When pitching link building services, you're not just saying "links help SEO"—you're saying "the data shows links are the #1 ranking factor, and your competitor has 3x more quality backlinks." This specificity builds trust and makes your recommendations more persuasive.

You can also use the 2019 research to develop service packages and retainer structures. Agencies that understand which factors correlate strongest with rankings can create tiered services that address the most impactful opportunities first. For web designers, this research informs your site architecture and on-page recommendations—knowing that title tags, keyword placement, and mobile-friendliness rank highly helps you push back against design decisions that harm SEO. Keep in mind the survey data is from 2019, so it's worth supplementing with more recent studies, but the core insights about links, content quality, and user signals remain valid. The key is using this framework not as gospel but as a foundation for having more informed conversations with clients about where their efforts will have the greatest return.