Domain Authority sounds official, which is part of why it gets over-trusted. It is a score produced by a software company.

Domain Authority sounds official, which is part of why it gets over-trusted. It is a score produced by a software company to predict how a site might perform in search results, and other vendors publish their own versions. None of these are Google metrics. Useful as rough filters, they shouldn't be the reason you accept or reject a publication.
Direct answer: To vet a US website for guest posting, evaluate relevance to your topic, the authenticity of its traffic and audience, its indexing status, the quality of its editorial content and its overall reputation. Third-party authority scores can help sort candidates, but they are not sufficient on their own.
Authority scores are calculated from link data, and links can be manufactured. A site may show a high score because of a large network of low-quality links, while a smaller niche publication with a loyal audience shows a modest number. Scores also vary between tools, so a single figure has limited meaning.
Relying on one number leads to two mistakes: rejecting good niche sites that seem "low" and accepting weak sites that look impressive.
Browse categories, recent headlines and author profiles. A publication should cover subjects close enough to yours that a reader interested in one would care about the other. For US-focused campaigns, confirm the audience is actually American, which you can often infer from spelling, examples, regulations referenced and local events covered.
Estimation tools can suggest traffic trends, but treat them cautiously. Look for consistent patterns rather than sudden spikes, and check whether visitors come from relevant countries. Signs of a real audience include comments, social sharing and newsletter signups.
Search the site's name and a few of its article titles in Google. A legitimate publication should appear. A site that is barely indexed, or that has vanished from results for its own brand, may have been penalised or abandoned. You can also use the "site:" operator to see roughly how many pages are indexed.
Read several recent posts. Are they original, well written and factually careful? Are authors named and verifiable? Note whether outbound links are relevant or seem inserted randomly.
Search for the publication's name along with terms such as "review" or "complaints". Consider how long the site has existed, whether its topic focus has changed abruptly, and who owns it. A domain that switched from a Spanish recipe blog to US finance content overnight deserves scrutiny.
Check how the site treats outbound links. Some publications mark paid or sponsored links with the appropriate attributes, which is consistent with Google's guidance. Extremely heavy outbound linking to unrelated commercial sites is a red flag.
Create a checklist and score each site on a simple scale. Include categories for relevance, audience, indexing, editorial quality, reputation and link context. Keep records so the team can revisit decisions.
When shortlisting guest post sites in the USA, apply the same checklist to every candidate, regardless of how appealing its headline metrics look. Consistency prevents impulsive choices.
Treating third-party scores as facts.
Ignoring the audience's geography.
Skipping a manual read of the site.
Overlooking recent changes in ownership or content.
Choosing sites solely because they accept payment quickly.
Neglecting to check whether prior guest posts are still live and indexed.
Prefer publications that serve identifiable US audiences: national trade outlets, regional business sites, industry associations or established niche blogs. Verify that your topic matches the site's existing content. Ask about editorial guidelines, turnaround times and any disclosure requirements before committing.
Diversify carefully. A mix of publication types (trade press, regional news, niche blogs) is more natural and resilient than concentrating on one category.
Once an article is live, confirm it is indexed, correctly formatted and links as agreed. Monitor referral traffic and any noticeable changes in visibility for the linked page. If a site later loses its search presence or shifts to spammy content, note it and avoid future placements.
Authority scores are a convenient sorting tool, but they can't replace judgement. When you assess relevance, real audience, editorial quality and reputation together, you are much more likely to choose US publications that benefit both readers and your brand.
No. Domain Authority is a score developed by a third-party software company. Google doesn't use it. It can be a useful rough comparison tool, but it should be combined with manual assessment of relevance, audience quality and editorial standards.
Relevance and audience quality are typically more important. A publication that covers your subject and attracts genuine readers is usually a better choice than a higher-scoring site with no topical connection or a questionable audience.
Search for the site's name and a few article titles in Google, and try the "site:domain.com" operator to see indexed pages. If the site barely appears or has vanished for its own brand name, investigate further before proceeding.
It can, but authenticity matters more than volume. Look for steady patterns, relevant geography and signs of engagement. Estimated traffic figures from third-party tools are approximations, so use them as one input among several.
Not automatically. Many legitimate publications offer sponsored options. What matters is transparency, editorial standards and proper link attributes where required. Be cautious with sites that publish anything for a fee without review.