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Ahrefs Site Audit — full issue taxonomy
173 tracked · 151 check unique · 15 category · severity = default importance (chỉnh được in-tool)
Ahrefs nhóm issue theo loại tài nguyên (page / link / redirect / image / JS / CSS / sitemap), tách Indexable vs Not indexable (nên 173 tracked > 151 check unique). Đặc trưng riêng: nhóm "… receives organic traffic" (cross dữ liệu GSC/clickstream), IndexNow, theo dõi drift (changed: title/H1/word-count/SERP/redirect), và AI-content detection. Chưa có llms.txt / semantic-HTML / GEO citability.
Mức độ (importance): EError (sửa ngay) WWarning (nên sửa) NNotice (gợi ý).
Internal pages · 6
E404 page
E4XX page
E500 page
E5XX page
ETimed out
WHTTPS/HTTP mixed content
Indexability · 16
ECanonical points to 4XX
ECanonical points to 5XX
WCanonical points to redirect
EPage size exceeds Googlebot's 2MB crawl limit
NNoindex page
WNofollow in HTML and HTTP header
WNofollow page
WNoindex in HTML and HTTP header
WNon-canonical page specified as canonical one
NNoindex follow page
NCanonical from HTTP to HTTPS
NCanonical from HTTPS to HTTP
NCanonical URL changed
NIndexable page became non-indexable
NNoindex and nofollow page
NNoindex page became indexable
Links · 12
EPage has links to broken page
WOrphan page (has no incoming internal links)
ECanonical URL has no incoming internal links
WHTTPS page has internal links to HTTP
WPage has no outgoing links
WPage has links to redirect
NPage has only one dofollow incoming internal link
NPage has nofollow incoming internal links only
NRedirected page has no incoming internal links
NHTTP page has internal links to HTTPS
NPage has nofollow and dofollow incoming internal links
NPage has nofollow outgoing internal links
Redirects · 10
EBroken redirect
ERedirect loop
WRedirect chain too long
N3XX redirect
W302 redirect
WHTTPS to HTTP redirect
NHTTP to HTTPS redirect
WRedirect chain
WMeta refresh redirect
NRedirect target changed
Content — Titles & Meta · 12
ETitle tag missing or empty
WMultiple title tags
WTitle too long
NTitle too short
NTitle tag changed
NPage and SERP titles do not match
NSERP title changed
WMeta description tag missing or empty
WMultiple meta description tags
NMeta description too long
NMeta description too short
NMeta description changed
Content — Headings, Body & AI · 6
WH1 tag missing or empty
WMultiple H1 tags
NH1 tag changed
NLow word count
NWord count changed
NPages have high AI content levels (AI-content detection)
Social tags · 5
WOpen Graph tags incomplete
WOpen Graph tags missing
NOpen Graph URL not matching canonical
NX (Twitter) card incomplete
NX (Twitter) card missing
Duplicates · 1
WDuplicate pages without canonical
Localization (hreflang) · 13
WHreflang and HTML lang mismatch
WHreflang annotation invalid
WHreflang to non-canonical
WHreflang to redirect or broken page
WHTML lang attribute invalid
WMissing reciprocal hreflang (no return-tag)
WMore than one page for same language in hreflang
WPage referenced for more than one language in hreflang
NHreflang defined but HTML lang missing
NHTML lang attribute missing
NSelf-reference hreflang annotation missing
NNot all pages from hreflang group were crawled
NX-default hreflang annotation missing
Usability & performance (CWV) · 13
WSlow page
WPages with poor LCP
WPages with poor CLS
WPages with poor INP
NPages with poor FID
WPage stopped passing CWV requirements
WHTML file size too large
WNot compressed
WContent is not sized correctly
WTap targets too small or too close together
WFont size too small
EViewport not set
NDocument uses plugins
Images · 7
EImage broken
EPage has broken image
NImage file size too large
WHTTPS page links to HTTP image
NImage redirects
WMissing alt text
NPage has redirected image
JavaScript · 5
EJavaScript broken
EPage has broken JavaScript
WHTTPS page links to HTTP JavaScript
NJavaScript redirects
NPage has redirected JavaScript
CSS · 6
ECSS broken
EPage has broken CSS
NCSS file size too large
WHTTPS page links to HTTP CSS
NCSS redirects
NPage has redirected CSS
Sitemaps · 17
ESitemap has syntax error
ESitemap is not accessible
ESitemap in the wrong format
E4XX page in sitemap
E5XX page in sitemap
W3XX redirect in sitemap
WNoindex page in sitemap
WNon-canonical page in sitemap
WPage from sitemap timed out
WSitemap larger than 50MB
WSitemap with over 50K URLs
WSitemap includes URLs out of its scope
NIndexable page not in sitemap
NPage in multiple sitemaps
NNo. of URLs in sitemap decreased
NPages added to sitemaps
NPages removed from sitemaps
External pages · 4
WExternal 4XX
WExternal 5XX
NExternal 3XX redirect
NExternal time out
Other (robots · structured data · traffic · IndexNow) · 18
ERobots.txt has syntax error
ERobots.txt is not accessible
ERobots.txt has too many redirects or redirect loop
WRobots.txt rules disallow to crawl
NRobots.txt changed
WStructured data has schema.org validation error
WStructured data has Google rich results validation error
NDouble slash in URL
NMore than three parameters in URL
NPages to submit to IndexNow
W3XX page receives organic traffic
W403 page receives organic traffic
W4XX page receives organic traffic
WNoindex page receives organic traffic
WNon-canonical page receives organic traffic
NOrganic traffic dropped
NPages dropped from Top 10
NNo. of referring domains dropped