Measures 153994 SEO Factors

152272 Built-In SEO Factors

143052 On-page SEO Factors

9220 Google Maps SEO Factors for Local SEO

1722 SEO Factors from APIs

147 API SEO Factors for off-page SEO like backlinks and referring domains.

[ Ahrefs, SEMRush, DomDetailer, SpyFu APIs ]

1575 Technology Stack SEO Factors

[ Wappalyzer API ]

The Cora Shared Data contains over 300 million SEO factor measurements and grows hourly.

Google Maps and Bing Factors are not yet available for viewing but will be coming soon!
Aggregate SEO Weather Top SEO Factors - Aggregate SEO Weather

TOP SEO Factors for 2026-08     previous

Top SEO Factor data is updated daily for latest "month to date" measurements.

NameCorrelation#1 MaxPage 1 AvgUsage %Searches %
1Number of H3 Tags   Size-0.39171250 %33 %
2Number of No Follow Backlinks   Authority-0.34196565939 %67 %
3Number of Backlinks   Authority-0.337728276046 %83 %
4Number of Referring Domains   Authority-0.332557446 %83 %
5Number of Do Follow Backlinks   Authority-0.317597223440 %83 %
6Clean Text Kilobytes   Size-0.3241773 %67 %
7Number of Unique LSI Words Used   Diversity-0.3106392184 %50 %
8Word Count   Size-0.33111216684 %67 %
9Has US Phone Number   Trust-0.291145 %67 %
10Flesch Kincaid Reading Grade Level   Other-0.285385 %83 %
11Number of HTTPS Links   Authority-0.2723615479 %67 %
12Number of Links   Authority-0.2723915479 %67 %
13Number of Internal Links   Authority-0.2621013678 %67 %
14Has Copyright   Trust-0.261181 %33 %
15Entities in H1 Tags-0.265357 %83 %
16Number of Distinct Entities Used   Diversity-0.25513580 %83 %
17Number Of Claimed Brands   Other-0.2521837 %67 %
18Number of Unique Variations Used   Diversity-0.25191164 %83 %
19Has Entities in H1 Tags   Relevancy-0.251162 %100 %
20Load Time Milliseconds   Performance-0.252015147082 %67 %
21Unabridged Word Count   Size-0.244278296080 %83 %
22Number of Images   Size-0.24463078 %83 %
23Number of Questions In H2 Tags   Size-0.244238 %67 %
24Uses Schema postalcode   Other-0.241137 %67 %
25Uses Microdata telephone   Other-0.23113 %17 %
26Uses JSON-LD name   Other-0.231172 %50 %
27Percentage of DoFollow Internal Links   Authority-0.23828082 %33 %
28Entities in H2 Tags-0.23321561 %100 %
29Entities in H3 Tags-0.23231040 %67 %
30Variations in H1 and H2 Tags   Relevancy-0.2212767 %83 %
31Has Contact Page   Trust-0.221148 %67 %
32Variations in Search Result Document File Name   Relevancy-0.222145 %100 %
33Number of H1 Tags   Size-0.222170 %100 %
34Number of US Phone Numbers   Trust-0.22181045 %67 %
35Uses JSON-LD BreadcrumbList   Other-0.221145 %67 %
36Has Meta Viewport   Technology-0.221174 %50 %
37Has OpenGraph Type   Relevancy-0.221161 %50 %
38Has JSON-LD Schema Markup   Relevancy-0.221171 %50 %
39Uses Schema addresslocality   Other-0.221138 %67 %
40Uses Schema addressregion   Other-0.211131 %83 %
41Number of Images with ALT Text   Size-0.21381968 %100 %
42Entities in the HTML Tag   Relevancy-0.2157726978 %100 %
43Number of Meta Generator Tags   Technology-0.212240 %67 %
44Has Entities in H2 Tags   Relevancy-0.211167 %83 %
45Uses Schema website   Other-0.211135 %67 %
46Percentage of DoFollow External Links   Authority-0.21181373 %83 %
47Uses JSON-LD address   Other-0.21113 %17 %
48Uses JSON-LD ListItem   Other-0.211146 %67 %
49Uses Microdata LegalService   Other-0.21112 %17 %
50Variations in H1, H2, and H3 Tags   Relevancy-0.21191068 %67 %
51Inline CSS Kilobytes   Size-0.21917567 %67 %
52Variations making whole H1 Tags   Relevancy-0.21116 %83 %
53Variations in H2 Tags   Relevancy-0.211659 %83 %
54Entities in Sentences   Relevancy-0.257226475 %100 %
55Leading Variations in H1-H6 Tags   Relevancy-0.23257 %83 %
56Number of Factors Used   Diversity-0.227923091 %83 %
57Uses Schema breadcrumblist   Other-0.21148 %67 %
58Leading Variations in H1, H2, and H3 Tags   Relevancy-0.23257 %83 %
59Exact Matches in the HTML Tag   Relevancy-0.29434 %100 %
60Variations in H1-H6 Tags   Relevancy-0.2221169 %67 %
61Variations in LI Tags   Relevancy-0.19753870 %83 %
62Has Canonical URL   Authority-0.191165 %50 %
63Search Result Domain Length   Size-0.19191782 %100 %
64Search Result Host Length   Size-0.19191782 %100 %
65Uses JSON-LD SearchAction   Other-0.191132 %67 %
66Uses Schema streetaddress   Other-0.191138 %67 %
67Variations in A Tags   Relevancy-0.19793468 %83 %
68Entities in Title Tag   Relevancy-0.198575 %83 %
69Number of Top 200 Shared Factors Used   Diversity-0.19493990 %100 %
70Search Result Uses HTTPS   Other-0.191179 %67 %
71Has FavIcon   Technology-0.191168 %50 %
72Number of External Links   Authority-0.19301973 %100 %
73Uses JSON-LD contactOption   Other-0.19112 %17 %
74Uses Microdata addressCountry   Other-0.19112 %17 %
75Uses Microdata geo   Other-0.19112 %17 %
76Uses Microdata GeoCoordinates   Other-0.19112 %17 %
77Uses Microdata latitude   Other-0.19112 %17 %
78Uses Microdata longitude   Other-0.19112 %17 %
79Headings Has Question   Other-0.191139 %83 %
80Uses Schema attorney   Other-0.19117 %50 %
81Uses Schema contactoption   Other-0.19112 %17 %
82Uses Schema geo   Other-0.19112 %17 %
83Uses Schema listitem   Other-0.191148 %67 %
84Variations in Search Result URL Path   Relevancy-0.192146 %100 %
85Has Meta Charset   Technology-0.191174 %67 %
86Uses JSON-LD streetAddress   Other-0.191137 %67 %
87Number of H2 Tags   Size-0.1914969 %100 %
88Uses Schema name   Other-0.191176 %50 %
89Variations making whole H1, H2, and H3 Tags   Relevancy-0.191123 %83 %
90Uses JSON-LD postalCode   Other-0.191135 %83 %
91Number of Heading Tags   Size-0.19382369 %83 %
92Is Home Page   Other-0.191110 %67 %
93Variations making whole H1-H6 Tags   Relevancy-0.181124 %83 %
94Number of DoFollow Links   Authority-0.1823713177 %100 %
95Uses Schema legalservice   Other-0.181138 %50 %
96Has Privacy Policy   Trust-0.181157 %67 %
97Variations in the Title Tag   Relevancy-0.182270 %67 %
98Search Result Summary Length   Size-0.1815314990 %83 %
99Number of Images without ALT Text   Size-0.1820951 %83 %
100Number of DoFollow External Links   Authority-0.18301872 %100 %
101Number of Top 100 Shared Factors Used   Diversity-0.18372990 %100 %
102Uses JSON-LD Campground   Other-0.18111 %17 %
103Uses JSON-LD mainEntity   Other-0.18111 %17 %
104Uses Microdata logo   Other-0.18112 %33 %
105Uses Schema campground   Other-0.18111 %17 %
106Uses Schema servicetype   Other-0.18116 %33 %
107Uses JSON-LD Attorney   Other-0.18116 %50 %
108Uses Schema telephone   Other-0.181141 %67 %
109Uses Schema postaladdress   Other-0.181132 %83 %
110Average Words Per Sentence   Size-0.18452676 %100 %
111Uses JSON-LD addressRegion   Other-0.181129 %100 %
112Uses Schema url   Other-0.181159 %50 %
113Exact Matches in Sentences   Relevancy-0.183228 %83 %
114Uses JSON-LD PostalAddress   Other-0.181131 %83 %
115Search Result URL Length   Size-0.18796489 %33 %
116Leading Variations in H1 Tags   Relevancy-0.181137 %100 %
117Number of P Tags   Size-0.18725171 %100 %
118TF/IDF   Relevancy-0.171152 %83 %
119Uses JSON-LD LegalService-0.171138 %50 %
120Is Article Page   Other-0.171154 %67 %
121Uses Schema pricerange   Other-0.171127 %67 %
122Number of Forms   Technology-0.172256 %83 %
123Variations in Form Tags   Relevancy-0.173223 %83 %
124Uses JSON-LD addressLocality   Other-0.171136 %83 %
125Uses JSON-LD description   Other-0.171148 %83 %
126Has Entities in H3 Tags   Relevancy-0.171146 %83 %
127Uses JSON-LD award   Other-0.17111 %33 %
128Uses JSON-LD NewsArticle   Other-0.17111 %17 %
129Uses JSON-LD OrganizationRole   Other-0.17111 %33 %
130Uses JSON-LD SearchResultsPage   Other-0.17111 %33 %
131Uses JSON-LD specialty   Other-0.17111 %33 %
132Uses Microdata CompleteDataFeed   Other-0.17111 %17 %
133Uses Microdata dataFeedElement   Other-0.17111 %17 %
134Uses Microdata DataFeedItem   Other-0.17111 %17 %
135Uses Schema award   Other-0.17111 %33 %
136Uses Schema completedatafeed   Other-0.17111 %17 %
137Uses Schema datafeedelement   Other-0.17111 %17 %
138Uses Schema datafeeditem   Other-0.17111 %17 %
139Uses Schema newsarticle   Other-0.17111 %17 %
140Uses Schema organizationrole   Other-0.17111 %33 %
141Uses Schema searchresultspage   Other-0.17111 %33 %
142Uses Schema specialty   Other-0.17111 %33 %
143Number of Top 50 Shared Factors Used   Diversity-0.17151290 %100 %
144Uses JSON-LD ProfessionalService   Other-0.17111 %33 %
145Uses Schema professionalservice   Other-0.17111 %33 %
146Uses JSON-LD priceRange   Other-0.171127 %67 %
147Leading Variations in H2 Tags   Relevancy-0.161128 %83 %
148Number Of JSON-LD Types   Relevancy-0.16543472 %50 %
149Uses Schema image   Other-0.161139 %50 %
150Title Tag Has Entities   Relevancy-0.161174 %67 %
151Variations in OpenGraph Title   Relevancy-0.162261 %67 %
152Term Frequency   Relevancy-0.164367 %100 %
153Leading Variations in Title Tag   Relevancy-0.161142 %100 %
154Variations in Class Attributes   Relevancy-0.169316 %100 %
155Variations in H1 Tags   Relevancy-0.162149 %83 %
156Variations in Section Tags   Relevancy-0.16622840 %100 %
157Uses JSON-LD ScholarlyArticle   Other-0.16111 %17 %
158Uses JSON-LD telePhone   Other-0.161132 %67 %
159Uses Microdata dateCreated   Other-0.16111 %33 %
160Uses Schema scholarlyarticle   Other-0.16111 %17 %
161Uses Schema searchaction   Other-0.161133 %83 %
162Number of CSS Includes   Technology-0.1612975 %67 %
163Percentage of NoFollow Links   Authority-0.163221 %67 %
164Variations in ALT Attributes   Relevancy-0.1612642 %100 %
165Has DocType Tag   Technology-0.161171 %50 %
166Has Meta Twitter Card   Authority-0.161151 %67 %
167Uses JSON-LD url   Other-0.161159 %67 %
168Uses Schema organization   Other-0.161143 %67 %
169Uses JSON-LD Article   Other-0.15117 %50 %
170Number of Facebook Pages   Authority-0.153256 %67 %
171Number of NoFollow External Links   Authority-0.152218 %67 %
172Uses Schema hasmap   Other-0.151116 %67 %
173Has Google Verify   Technology-0.151122 %83 %
174Variations in Strong Tags   Relevancy-0.155327 %83 %
175Number of Questions In Headings   Size-0.157339 %83 %
176Variations in I Tags   Relevancy-0.157420 %100 %
177Uses JSON-LD WebSite   Other-0.151120 %83 %
178Variations in the Canonical URL   Relevancy-0.153245 %83 %
179Uses JSON-LD ContactPoint   Other-0.15118 %67 %
180Uses JSON-LD Hotel   Other-0.15111 %17 %
181Uses JSON-LD image   Other-0.151127 %50 %
182Uses JSON-LD QuantitativeValue   Other-0.15112 %33 %
183Uses Microdata additionalName   Other-0.15111 %17 %
184Uses Microdata agentInteractionStatistic   Other-0.15111 %17 %
185Uses Microdata alternateName   Other-0.15111 %17 %
186Uses Microdata Collection   Other-0.15111 %17 %
187Uses Microdata commentCount   Other-0.15111 %17 %
188Uses Microdata EntryPoint   Other-0.15111 %17 %
189Uses Microdata hasPart   Other-0.15111 %17 %
190Uses Microdata homeLocation   Other-0.15111 %17 %
191Uses Microdata isPartOf   Other-0.15111 %17 %
192Uses Microdata owns   Other-0.15111 %17 %
193Uses Microdata Place   Other-0.15111 %17 %
194Uses Microdata potentialAction   Other-0.15111 %17 %
195Uses Microdata ProfilePage   Other-0.15111 %17 %
196Uses Microdata relatedLink   Other-0.15111 %17 %
197Uses Microdata SearchAction   Other-0.15111 %17 %
198Uses Microdata sharedContent   Other-0.15111 %17 %
199Uses Microdata SocialMediaPosting   Other-0.15111 %17 %
200Uses Microdata target   Other-0.15111 %17 %