What Is DA in SEO – Complete Guide to DA, PA, DR, Domain Authority, and Spam Score

Understanding SEO metrics is important if you want your website to rank higher. Among all SEO metrics, DA, PA, DR, Domain Authority, and Spam Score are the most commonly used. These scores help you check your website’s performance, authority, and ranking ability compared to competitors.

What Is DA in SEO

DA (Domain Authority) is a score developed by Moz that predicts how well a website will rank on search engines. The score ranges from 0 to 100.
Higher DA means your website has strong authority, a good backlink profile, and better chances of ranking on Google.

Factors that influence DA:

• Number of quality backlinks
• Website trust and credibility
• Domain age
• Content quality
• Overall SEO performance

What Is DA, PA in SEO

DA measures the strength of an entire website.
PA (Page Authority) measures the strength of a specific page.

Both these metrics help you understand how powerful your website and its pages are in terms of ranking potential. PA also ranges from 0 to 100, and a higher score means that page has strong authority and better ranking capability.

What Is PA in SEO

PA in SEO tells how strong and trustworthy an individual webpage is.
A page with high Page Authority usually ranks faster for competitive keywords.
PA depends on:

• Page-level backlinks
• Content depth
• Internal linking
• On-page SEO

What Is DR in SEO

DR (Domain Rating) is a metric developed by Ahrefs. It also ranges from 0 to 100, and it shows how strong your website’s backlink profile is compared to others.
While DA is based on Moz’s algorithm, DR is based on Ahrefs’ database.
Both help you measure website authority and link strength.

What Is Domain Authority

Domain Authority is a combined measure of your website’s trust, backlink quality, and search engine influence. Although Google does not officially use DA, it is widely used by SEO professionals to compare websites and understand ranking competition.

A higher Domain Authority means:

• Strong backlink profile
• Better page indexing
• Higher credibility
• More ranking power

How To Increase Domain Authority

Increasing your DA takes time, but the right SEO strategy helps improve it steadily.
Here are effective ways to increase Domain Authority:

• Build high-quality backlinks from relevant websites
• Publish unique, helpful, well-researched content
• Improve technical SEO, fix errors, optimize speed
• Use internal linking to distribute authority
• Remove spammy or toxic backlinks
• Increase user engagement (low bounce rate, high time-on-page)
• Keep updating old content to maintain freshness
• Get listed on reputable directories and niche websites

These steps gradually improve your website authority and overall SEO.

Domain Authority Checker

You can check DA using these free Domain Authority checker tools:

• Moz DA Checker
• Ahrefs Authority Checker
• SEMrush Authority Score
• Small SEO Tools DA Checker
• Website SEO Checker
• SEO Review Tools

These tools also show PA, DR, backlinks, and overall SEO health.

Spam Score in SEO

Spam Score is a metric created by Moz that identifies how many spam signals a website has.
A high spam score means your website may have:

• Low-quality backlinks
• Over-optimized anchor text
• Irrelevant link-building
• Thin or duplicate content
• Risky SEO practices

Keeping a low spam score improves ranking stability and helps protect your domain from penalties.
Always monitor your backlink profile and remove harmful links regularly.