Page Authority uses machine learning algorithms to evaluate numerous ranking signals and predict a page's ability to rank in search results. The scoring system analyzes factors like backlink quantity and quality, content relevance, and on-page optimization elements to generate a score between 1 and 100, with higher scores indicating stronger ranking potential.
The algorithm particularly emphasizes the page's link profile, examining both direct backlinks and the authority passed through the linking domain's own authority metrics. This creates a complex web of interconnected trust signals that helps determine the final PA score.
Page Authority serves as a comparative metric for evaluating the relative strength of specific pages within the search landscape. Unlike Domain Authority, which measures entire website strength, PA focuses on individual URL performance, making it valuable for:
Page Authority follows a logarithmic scale, meaning it's significantly harder to improve scores at the higher end of the spectrum. For example, moving from PA 20 to 30 is generally easier than improving from PA 70 to 80.
The score updates regularly to reflect changes in:
Backlink profiles
Content quality signals
Technical optimization
Search engine algorithm updates
SEO professionals use Page Authority alongside other metrics to make data-driven decisions about content strategy and optimization priorities. For example, when conducting competitive analysis, PA helps identify which competitor pages pose the strongest ranking challenge for specific keywords.
It's important to note that while Page Authority correlates with ranking potential, it's not a direct ranking factor used by search engines. Rather, it's a predictive tool that aggregates many signals that do influence rankings.
Real-world example showing Page Authority scores for top-ranking pages in the running shoes niche. Notice the strong correlation between PA scores and SERP positions, with higher PA pages typically ranking better.
{
"keyword": "best running shoes",
"top_ranking_pages": [
{
"url": "https://www.runnersworld.com/gear/best-running-shoes/",
"page_authority": 76,
"backlinks": 2134,
"referring_domains": 428,
"ranking_position": 1
},
{
"url": "https://www.nike.com/running/shoes",
"page_authority": 68,
"backlinks": 1876,
"referring_domains": 312,
"ranking_position": 2
},
{
"url": "https://www.rei.com/learn/expert-advice/running-shoes.html",
"page_authority": 61,
"backlinks": 945,
"referring_domains": 203,
"ranking_position": 3
}
]
}
Scores above 50 are generally considered strong, though this varies by industry and competition level. New pages typically start with PA 1, and scores should be evaluated relative to direct competitors rather than absolute values.
Focus on earning quality backlinks from relevant, authoritative sites, creating high-quality content, and ensuring strong technical SEO fundamentals. Remember that PA improvements often take time due to the metric's logarithmic scale.
Page Authority measures individual webpage strength, while Domain Authority evaluates entire domain trust. PA is more useful for page-specific comparisons, while DA indicates overall site strength.
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