Measures 147711 SEO Factors

145989 Built-In SEO Factors

136823 On-page SEO Factors

9166 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 2025-12     previous

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

NameCorrelation#1 MaxPage 1 AvgUsage %Searches %
1Number of Unique LSI Words Used   Diversity-0.23101532584 %82 %
2Number of Unique Variations Used   Diversity-0.2224780 %87 %
3Number of Distinct Entities Used   Diversity-0.22632979 %94 %
4Entities in Title Tag   Relevancy-0.227370 %93 %
5Number of Top 200 Shared Factors Used   Diversity-0.22534097 %93 %
6Number of Top 100 Shared Factors Used   Diversity-0.21393097 %92 %
7Number of Top 50 Shared Factors Used   Diversity-0.21171396 %92 %
8Search Result Domain is .com, .net, or .org   Other-0.21114 %63 %
9Variations in Div Tags   Relevancy-0.25222314174 %89 %
10Load Time Milliseconds   Performance-0.223823144385 %88 %
11Variations in Body Tags   Relevancy-0.213377232979 %89 %
12Variations in H1, H2, and H3 Tags   Relevancy-0.19169663 %88 %
13Variations in H1-H6 Tags   Relevancy-0.19189764 %88 %
14Variations in HTML Tags   Relevancy-0.1913377232678 %90 %
15Variations in H1 and H2 Tags   Relevancy-0.1978461 %87 %
16Variations in P Tags   Relevancy-0.1927543268 %90 %
17Search Result Domain is .com   Other-0.19114 %62 %
18Entities in the HTML Tag   Relevancy-0.1977314675 %94 %
19Entities in Sentences   Relevancy-0.1963014272 %94 %
20Entities in H1 Tags-0.197258 %91 %
21Number of Factors Used   Diversity-0.1930718097 %89 %
22Variations in Search Result Document File Name   Relevancy-0.199145 %80 %
23Variations in Sentences   Relevancy-0.18106104271 %89 %
24Term Frequency   Relevancy-0.185378 %89 %
25Variations in LI Tags   Relevancy-0.1828912266 %88 %
26Variations in A Tags   Relevancy-0.1854832465 %84 %
27Number of Referring Domains   Authority-0.18242511145 %70 %
28Variations in Search Result Display URL   Relevancy-0.1815276 %82 %
29Entities in H2 Tags-0.1831754 %93 %
30Variations in Search Result Link Text   Relevancy-0.1815276 %81 %
31Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1818244 %86 %
32Variations in the Title Tag   Relevancy-0.1816264 %86 %
33Variations in H1 Tags   Relevancy-0.1712154 %87 %
34LSI Words in Title Tag   Relevancy-0.1714671 %93 %
35Leading Variations in H1-H6 Tags   Relevancy-0.1720246 %87 %
36LSI Words in Sentences   Relevancy-0.17406875969 %94 %
37Number of Backlinks   Authority-0.17770312689145 %72 %
38Variations in Search Result URL Path   Relevancy-0.179146 %85 %
39Number of Images   Size-0.172613078 %86 %
40Number of HTML Tags   Size-0.173505113185 %86 %
41Exact Matches in the HTML Tag   Relevancy-0.173491330 %85 %
42Variation Count in Top 30KB   Relevancy-0.1759572867 %87 %
43Variations in Meta Description   Relevancy-0.1743253 %84 %
44Clean Keyword Density in the HTML Tag   Relevancy-0.17150470 %80 %
45Variations in H2 Tags   Relevancy-0.1768345 %84 %
46Entities in Meta Description Tag   Relevancy-0.1711359 %88 %
47Number of Do Follow Backlinks   Authority-0.17715834628541 %71 %
48Word Count   Size-0.164352141985 %86 %
49Variations in the Canonical URL   Relevancy-0.1648250 %85 %
50Unabridged Word Count   Size-0.167633179285 %87 %
51Number of Images with ALT Text   Size-0.161792073 %87 %
52Clean Text Kilobytes   Size-0.161121277 %87 %
53Number of No Follow Backlinks   Authority-0.165447871234 %66 %
54Variations in A Tag HREF Attributes   Relevancy-0.1638014459 %87 %
55Variations in Span Tags   Relevancy-0.161081951 %87 %
56Leading Variations in H1 Tags   Relevancy-0.162129 %81 %
57Number of P Tags   Size-0.163113877 %88 %
58TF/IDF   Relevancy-0.161157 %86 %
59LSI Words in H1 Tags   Relevancy-0.1617561 %92 %
60Variations in First 100 Words   Relevancy-0.16152664 %83 %
61Entities in H3 Tags-0.1627745 %92 %
62Variations in ALT Attributes   Relevancy-0.16410644 %84 %
63Number of Heading Tags   Size-0.16532178 %86 %
64Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182759 %88 %
65Variation Density in Top 30KB   Relevancy-0.16296360 %81 %
66Has Entities in H1 Tags   Relevancy-0.161159 %87 %
67Variations in Search Result URL   Relevancy-0.1622153 %80 %
68Number of HTTPS Links   Authority-0.1695915782 %86 %
69Leading Variations in Title Tag   Relevancy-0.161132 %81 %
70Variations in Nav Tags   Relevancy-0.16131853647 %84 %
71Number of Links   Authority-0.1696215982 %85 %
72Number of Internal Links   Authority-0.1694214581 %85 %
73Number of DoFollow Links   Authority-0.1695615482 %86 %
74Percentage of DoFollow Internal Links   Authority-0.15937581 %86 %
75Number of Forms   Technology-0.1514356 %80 %
76Variations in Absolute URLs   Relevancy-0.1588476660 %87 %
77Variations in Main Tags   Relevancy-0.15254397838 %86 %
78Variations in Script Tags   Relevancy-0.154881512662 %85 %
79Variations in OpenGraph Title   Relevancy-0.1511153 %79 %
80Percentage of DoFollow Links   Authority-0.151008582 %91 %
81Exact Matches in H1-H6 Tags   Relevancy-0.1511119 %84 %
82Number of H1 Tags   Size-0.155272 %86 %
83Variations in OpenGraph Description   Relevancy-0.1597248 %79 %
84Number of HTML Comments   Size-0.159814674 %84 %
85Search Result Number of Dirs in Path   Other-0.154274 %76 %
86Title Tag Has Entities   Relevancy-0.151171 %88 %
87LSI Words in Meta Description Tag   Relevancy-0.15421158 %91 %
88Number of H2 Tags   Size-0.1518769 %85 %
89LSI Words in H2 Tags   Relevancy-0.15832158 %92 %
90Number of DoFollow External Links   Authority-0.15701276 %84 %
91Number of External Links   Authority-0.15811478 %85 %
92Variations in H3 Tags   Relevancy-0.1496333 %83 %
93Exact Matches in Top 30KB   Relevancy-0.1429218 %78 %
94Number of Includes   Technology-0.14492782 %75 %
95Number of Sentences   Size-0.14102812883 %84 %
96Variations making whole H1-H6 Tags   Relevancy-0.142117 %78 %
97Exact Matches in Sentences   Relevancy-0.1442321 %85 %
98Has JSON-LD Schema Markup   Relevancy-0.141155 %73 %
99Flesch Kincaid Reading Grade Level   Other-0.147292 %87 %
100Number of H3 Tags   Size-0.1438861 %83 %
101Variations in Footer Tags   Relevancy-0.1439751236 %83 %
102Leading Variations in H2 Tags   Relevancy-0.148122 %82 %
103Has Entities in H2 Tags   Relevancy-0.141154 %85 %
104Number of Facebook Pages   Authority-0.149260 %78 %
105Variations making whole H1, H2, and H3 Tags   Relevancy-0.141116 %78 %
106Exact Matches in Title Tag   Relevancy-0.142117 %84 %
107Average Words Per Sentence   Size-0.141663180 %80 %
108Number of Images without ALT Text   Size-0.141061059 %81 %
109Number Of JSON-LD Types   Relevancy-0.141461457 %79 %
110Has Meta Charset   Technology-0.141176 %83 %
111Has Privacy Policy   Trust-0.141158 %73 %
112Variations in TITLE Attributes   Relevancy-0.14345637 %81 %
113Variations in Section Tags   Relevancy-0.1415601737 %83 %
114Number of CSS Includes   Technology-0.13201075 %75 %
115Search Result Host Length   Size-0.13261785 %78 %
116Number of Absolute URLs   Authority-0.13114928584 %79 %
117Search Result Domain Length   Size-0.13261785 %78 %
118Has Form   Technology-0.131155 %77 %
119Search Result Uses HTTPS   Other-0.131185 %84 %
120Page Size Kilobytes   Size-0.13100430784 %77 %
121Number of Questions In Headings   Size-0.138236 %81 %
122Variations making whole H1 Tags   Relevancy-0.131110 %77 %
123Variations Making Whole Span Tags   Relevancy-0.134120 %82 %
124Has Canonical URL   Authority-0.131172 %79 %
125LSI Words in H3 Tags   Relevancy-0.13942050 %89 %
126Has Meta Viewport   Technology-0.131183 %82 %
127Variations in Strong Tags   Relevancy-0.1395225 %82 %
128Meta Description Tag Has Entities   Relevancy-0.131158 %79 %
129Title Length   Size-0.13935184 %79 %
130Is Store Page   Other-0.131150 %70 %
131Number of Questions   Size-0.131431169 %81 %
132Entities in H4 Tags-0.1310222 %85 %
133Title Word Count   Size-0.1314883 %78 %
134Has Meta Description   Relevancy-0.131167 %78 %
135Variations making whole A Tags   Relevancy-0.13111228 %74 %
136Number of Instagram Pages   Authority-0.1316248 %76 %
137Exact Matches in H1 Tags   Relevancy-0.132114 %83 %
138Variations Making Whole LI Tags   Relevancy-0.136125 %76 %
139Number of Prices   Size-0.1310356868 %80 %
140Has FavIcon   Technology-0.131177 %80 %
141Inline CSS Kilobytes   Size-0.132276066 %73 %
142Meta Description Length   Size-0.1366012268 %78 %
143Has Entities in H3 Tags   Relevancy-0.131146 %82 %
144Number of H4 Tags   Size-0.1316438 %79 %
145Number of Questions In H2 Tags   Size-0.124123 %77 %
146Number of JavaScript Includes   Technology-0.12381882 %75 %
147Uses Schema name   Other-0.121162 %68 %
148Uses JSON-LD name   Other-0.121154 %71 %
149Has Schema Markup   Relevancy-0.121165 %73 %
150Percentage of DoFollow External Links   Authority-0.12321175 %76 %
151Word Count in Meta Description   Size-0.12482067 %78 %
152Uses Schema sku   Other-0.12116 %34 %
153Is Purchase Page   Other-0.121143 %67 %
154Has Contact Page   Trust-0.121164 %72 %
155Headings Has Question   Other-0.121136 %76 %
156Number of Social Pages   Authority-0.1217465 %78 %
157Inline JavaScript Kilobytes   Size-0.1270210681 %75 %
158Number of Social Accounts   Authority-0.1215242 %79 %
159Uses Schema image   Other-0.121123 %65 %
160Variations in I Tags   Relevancy-0.12299425 %78 %
161Number of Facebook Accounts   Authority-0.128129 %77 %
162Is Home Page   Other-0.121119 %39 %
163Number of Email Addresses   Trust-0.1272445 %80 %
164Variations in Button Tags   Relevancy-0.12427068 %79 %
165Variations in the last 100 words   Relevancy-0.12195345 %80 %
166Uses Schema itemreviewed   Other-0.12112 %19 %
167Number of LinkedIn Pages   Authority-0.1214129 %73 %
168Number of Nofollow Links   Authority-0.1223426 %77 %
169Uses Schema aggregaterating   Other-0.121111 %60 %
170Uses JSON-LD sku   Other-0.12115 %36 %
171Number of HREF Lang Tags   Size-0.1244212 %74 %
172Has OpenGraph Type   Relevancy-0.121162 %71 %
173Uses JSON-LD BreadcrumbList   Other-0.121136 %65 %
174Uses JSON-LD image   Other-0.121117 %70 %
175Uses JSON-LD ListItem   Other-0.121137 %67 %
176Exact Matches in H2 Tags   Relevancy-0.125111 %83 %
177Uses JSON-LD description   Other-0.121143 %65 %
178Uses Schema gtin13   Other-0.12113 %12 %
179Search Result URL Length   Size-0.121056297 %58 %
180Number of US Phone Numbers   Trust-0.116701237 %78 %
181Variations in Meta Twitter Content   Relevancy-0.114124 %68 %
182Uses Schema availability   Other-0.11117 %48 %
183Uses Schema pricecurrency   Other-0.11118 %50 %
184Has HREF Lang   Technology-0.111114 %69 %
185Variations in Article Tags   Relevancy-0.116171122 %71 %
186Variations in Meta Twitter Description   Relevancy-0.1130122 %72 %
187Has OpenGraph Image   Relevancy-0.111153 %69 %
188Uses Schema listitem   Other-0.111144 %63 %
189Leading Variations in H3 Tags   Relevancy-0.1110115 %77 %
190Number of Questions In H3 Tags   Size-0.116117 %76 %
191Uses Schema product   Other-0.111110 %53 %
192Uses Schema ratingvalue   Other-0.111110 %58 %
193Uses Schema organization   Other-0.111136 %63 %
194Uses JSON-LD itemCondition   Other-0.11114 %27 %
195Has Meta Robots   Other-0.111127 %70 %
196Uses JSON-LD priceCurrency   Other-0.11118 %53 %
197Uses Schema breadcrumblist   Other-0.111144 %63 %
198Has Terms of Service   Trust-0.111133 %63 %
199Uses JSON-LD url-0.111146 %72 %
200Uses Microdata sku   Other-0.11113 %11 %