Measures 146780 SEO Factors

145058 Built-In SEO Factors

135910 On-page SEO Factors

9148 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 2025-11     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-0.23134533283 %80 %
2Search Result Domain is .com, .net, or .org   Other-0.21115 %74 %
3Number of Distinct Entities Used   Diversity-0.211063079 %95 %
4Entities in Title Tag   Relevancy-0.218369 %94 %
5Load Time Milliseconds   Performance-0.2132075147984 %91 %
6Number of Top 100 Shared Factors Used   Diversity-0.21392998 %93 %
7Number of Top 200 Shared Factors Used   Diversity-0.21523898 %93 %
8Search Result Domain is .com   Other-0.21114 %73 %
9Number of Unique Variations Used   Diversity-0.2129777 %87 %
10Number of Top 50 Shared Factors Used   Diversity-0.2171298 %92 %
11Entities in the HTML Tag   Relevancy-0.286615275 %95 %
12Entities in Sentences   Relevancy-0.274514871 %95 %
13Variations in H1-H6 Tags   Relevancy-0.19195763 %87 %
14Number of Referring Domains   Authority-0.19274412350 %70 %
15Variations in H1, H2, and H3 Tags   Relevancy-0.19179662 %86 %
16Entities in H1 Tags-0.1912256 %91 %
17Number of Backlinks   Authority-0.19253638629351 %71 %
18Variations in Body Tags   Relevancy-0.1816618028776 %89 %
19Variations in H1 and H2 Tags   Relevancy-0.1862460 %86 %
20Entities in H2 Tags-0.1833754 %92 %
21Variations in Div Tags   Relevancy-0.184488812372 %91 %
22Variations in P Tags   Relevancy-0.18300804465 %89 %
23Variations in HTML Tags   Relevancy-0.1816618028375 %90 %
24Number of Do Follow Backlinks   Authority-0.18249326557246 %70 %
25Number of Factors Used   Diversity-0.1837517798 %89 %
26Variations in LI Tags   Relevancy-0.17524204663 %88 %
27Variations in Sentences   Relevancy-0.1775843670 %89 %
28Variations in Search Result Document File Name   Relevancy-0.176142 %79 %
29Term Frequency   Relevancy-0.175375 %88 %
30Entities in H3 Tags-0.1743745 %92 %
31LSI Words in Sentences   Relevancy-0.17370377566 %94 %
32Variation Count in Top 30KB   Relevancy-0.1739481964 %85 %
33Leading Variations in H1-H6 Tags   Relevancy-0.1721243 %86 %
34Variations in Search Result Link Text   Relevancy-0.173278 %82 %
35Variations in Search Result Display URL   Relevancy-0.173278 %82 %
36Unabridged Word Count   Size-0.1723497186384 %88 %
37Variations in A Tags   Relevancy-0.1766172463 %86 %
38Word Count   Size-0.176250144984 %88 %
39Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1720241 %86 %
40Variations in the Title Tag   Relevancy-0.1711263 %86 %
41Clean Text Kilobytes   Size-0.171381376 %88 %
42Number of HTML Tags   Size-0.173693107284 %88 %
43Number of Images   Size-0.173063276 %88 %
44Clean Keyword Density in the HTML Tag   Relevancy-0.17165367 %80 %
45Number of No Follow Backlinks   Authority-0.172706169738 %68 %
46Variations in Search Result URL Path   Relevancy-0.177144 %80 %
47Entities in Meta Description Tag   Relevancy-0.179359 %90 %
48Variations in H1 Tags   Relevancy-0.178152 %85 %
49Number of Images with ALT Text   Size-0.162792271 %86 %
50Number of Includes   Technology-0.16722780 %79 %
51Variations in H2 Tags   Relevancy-0.1654345 %84 %
52Number of Heading Tags   Size-0.16672275 %86 %
53Number of P Tags   Size-0.161353975 %87 %
54Has Entities in H1 Tags   Relevancy-0.161157 %87 %
55Search Result Number of Dirs in Path   Other-0.164273 %77 %
56Variations in First 100 Words   Relevancy-0.16151561 %84 %
57LSI Words in Title Tag   Relevancy-0.1616668 %93 %
58Variations in Meta Description   Relevancy-0.1640253 %83 %
59Number of HTTPS Links   Authority-0.1653614780 %86 %
60Title Tag Has Entities   Relevancy-0.161169 %87 %
61Number of Links   Authority-0.1653714980 %86 %
62Number of DoFollow Links   Authority-0.1652314480 %86 %
63Variations in the Canonical URL   Relevancy-0.1641246 %82 %
64Variations in Main Tags   Relevancy-0.16145746136 %85 %
65Variations in ALT Attributes   Relevancy-0.16417743 %83 %
66Number of Internal Links   Authority-0.1652613380 %86 %
67Variation Density in Top 30KB   Relevancy-0.16295258 %81 %
68Variations in Distinct A Tag HREF Attributes   Relevancy-0.1619842357 %89 %
69Exact Matches in the HTML Tag   Relevancy-0.168261129 %83 %
70Variations in Span Tags   Relevancy-0.16834949 %87 %
71LSI Words in H1 Tags   Relevancy-0.1626557 %92 %
72Variations in A Tag HREF Attributes   Relevancy-0.1529773757 %89 %
73Percentage of DoFollow Links   Authority-0.15988280 %88 %
74Number of External Links   Authority-0.151061677 %86 %
75Number of Facebook Pages   Authority-0.1516259 %81 %
76Number of DoFollow External Links   Authority-0.15661475 %85 %
77Leading Variations in Title Tag   Relevancy-0.151129 %81 %
78TF/IDF   Relevancy-0.151155 %85 %
79Number of H1 Tags   Size-0.1511270 %87 %
80Percentage of DoFollow Internal Links   Authority-0.15907279 %85 %
81Number of Forms   Technology-0.1519254 %82 %
82Number of CSS Includes   Technology-0.15321073 %77 %
83Variations in OpenGraph Description   Relevancy-0.154248 %79 %
84Variations in OpenGraph Title   Relevancy-0.157152 %78 %
85Number of HTML Comments   Size-0.157075672 %85 %
86Variations in Absolute URLs   Relevancy-0.1595175358 %87 %
87Number of H2 Tags   Size-0.1521768 %86 %
88Variations in Script Tags   Relevancy-0.158975611061 %84 %
89Variations in Search Result URL   Relevancy-0.1517152 %76 %
90Number of Sentences   Size-0.1569712982 %83 %
91Has Entities in H2 Tags   Relevancy-0.151154 %86 %
92Number of Images without ALT Text   Size-0.15651158 %85 %
93Leading Variations in H1 Tags   Relevancy-0.151126 %80 %
94Has Form   Technology-0.151153 %77 %
95Has JSON-LD Schema Markup   Relevancy-0.151153 %76 %
96Average Words Per Sentence   Size-0.153183177 %82 %
97Number of H3 Tags   Size-0.1533960 %84 %
98LSI Words in H2 Tags   Relevancy-0.15922155 %92 %
99Flesch Kincaid Reading Grade Level   Other-0.146295 %86 %
100Has Meta Charset   Technology-0.141174 %82 %
101LSI Words in Meta Description Tag   Relevancy-0.14361056 %91 %
102Variations in Nav Tags   Relevancy-0.1483872745 %83 %
103Number of JavaScript Includes   Technology-0.14441881 %80 %
104Variations in H3 Tags   Relevancy-0.14118334 %83 %
105Exact Matches in H1-H6 Tags   Relevancy-0.1413118 %82 %
106Search Result Domain Length   Size-0.14271783 %79 %
107Search Result Host Length   Size-0.14271783 %78 %
108Has Entities in H3 Tags   Relevancy-0.141146 %84 %
109Variations in Section Tags   Relevancy-0.1410471736 %83 %
110Number of Absolute URLs   Authority-0.1499028683 %79 %
111Number Of JSON-LD Types   Relevancy-0.141501456 %82 %
112Entities in H4 Tags-0.1419222 %88 %
113Percentage of DoFollow External Links   Authority-0.14301174 %80 %
114Page Size Kilobytes   Size-0.14131632183 %76 %
115Search Result Uses HTTPS   Other-0.141183 %84 %
116Inline CSS Kilobytes   Size-0.141916165 %81 %
117Number of Questions In Headings   Size-0.148236 %82 %
118Has Meta Viewport   Technology-0.141181 %82 %
119Variations making whole H1-H6 Tags   Relevancy-0.142115 %79 %
120Variations making whole H1, H2, and H3 Tags   Relevancy-0.142114 %79 %
121LSI Words in H3 Tags   Relevancy-0.141272248 %89 %
122Leading Variations in H2 Tags   Relevancy-0.148121 %82 %
123Variations in Footer Tags   Relevancy-0.1360121034 %82 %
124Number of Prices   Size-0.1329627669 %81 %
125Number of Instagram Pages   Authority-0.1312246 %78 %
126Has Canonical URL   Authority-0.131171 %78 %
127Number of Social Pages   Authority-0.1330465 %81 %
128Number of Questions   Size-0.13811167 %78 %
129Number of LinkedIn Pages   Authority-0.137133 %77 %
130Word Count in Meta Description   Size-0.13481967 %77 %
131Number of Email Addresses   Trust-0.13280543 %79 %
132Meta Description Length   Size-0.1329111867 %78 %
133Is Home Page   Other-0.131120 %46 %
134Has Privacy Policy   Trust-0.131159 %74 %
135Has FavIcon   Technology-0.131175 %77 %
136Number of Facebook Accounts   Authority-0.133129 %78 %
137Number of US Phone Numbers   Trust-0.136671243 %81 %
138Has Meta Description   Relevancy-0.131166 %74 %
139Has Email   Trust-0.131143 %71 %
140Number of Social Accounts   Authority-0.1310243 %78 %
141Meta Description Tag Has Entities   Relevancy-0.131158 %81 %
142Uses JSON-LD name   Other-0.131153 %76 %
143Headings Has Question   Other-0.131136 %77 %
144Inline JavaScript Kilobytes   Size-0.13101912180 %72 %
145Has OpenGraph Type   Relevancy-0.131161 %70 %
146Number of Nofollow Links   Authority-0.1346525 %77 %
147Title Length   Size-0.131225082 %77 %
148Search Result URL Length   Size-0.13936398 %60 %
149Exact Matches in Top 30KB   Relevancy-0.1324217 %78 %
150Has US Phone Number   Trust-0.131142 %70 %
151Variations Making Whole LI Tags   Relevancy-0.135124 %76 %
152Number of H4 Tags   Size-0.1320437 %80 %
153Variations in Meta Twitter Content   Relevancy-0.132125 %69 %
154Is Store Page   Other-0.121145 %68 %
155Variations in TITLE Attributes   Relevancy-0.12268535 %80 %
156Exact Matches in Sentences   Relevancy-0.1242320 %83 %
157Title Word Count   Size-0.1218882 %77 %
158Has Contact Page   Trust-0.121163 %70 %
159Is Purchase Page   Other-0.121146 %65 %
160Variations making whole A Tags   Relevancy-0.1268128 %76 %
161Variations in Strong Tags   Relevancy-0.1262224 %79 %
162Variations in the last 100 words   Relevancy-0.12149344 %79 %
163Has OpenGraph Image   Relevancy-0.121154 %68 %
164Variations in Meta Twitter Description   Relevancy-0.1223123 %72 %
165Has Terms of Service   Trust-0.121141 %67 %
166Variations in I Tags   Relevancy-0.12108322 %78 %
167Has Meta Twitter Card   Authority-0.121152 %65 %
168Number of Questions In H3 Tags   Size-0.125117 %75 %
169Has Schema Markup   Relevancy-0.121163 %73 %
170Uses Schema name   Other-0.121160 %70 %
171Uses JSON-LD url   Other-0.121147 %75 %
172Variations making whole H1 Tags   Relevancy-0.12118 %78 %
173Variations Making Whole Span Tags   Relevancy-0.127118 %81 %
174Uses JSON-LD CollectionPage   Other-0.12114 %32 %
175Exact Matches in Title Tag   Relevancy-0.122116 %80 %
176Is Pagination Page   Other-0.121119 %64 %
177Uses Schema collectionpage   Other-0.12114 %32 %
178Uses Schema url   Other-0.121155 %67 %
179Uses Schema sku   Other-0.12115 %27 %
180Number of Questions In H2 Tags   Size-0.124123 %75 %
181Leading Variations in H3 Tags   Relevancy-0.1212115 %77 %
182Has Google Verify   Technology-0.121122 %67 %
183Number of Twitter Accounts   Authority-0.123125 %71 %
184Variations in Button Tags   Relevancy-0.12256539 %80 %
185Variations in H4-H6 Tags   Relevancy-0.1216117 %79 %
186Percentage of NoFollow Links   Authority-0.1215222 %75 %
187Uses JSON-LD ItemList   Other-0.12114 %43 %
188Has Entities in H4 Tags   Relevancy-0.121122 %78 %
189Uses Schema itemlist   Other-0.12114 %45 %
190Uses JSON-LD ListItem   Other-0.121134 %70 %
191Uses Schema organization   Other-0.111135 %67 %
192Uses JSON-LD sku   Other-0.11114 %27 %
193Is Article Page   Other-0.111142 %66 %
194Uses JSON-LD description   Other-0.111141 %70 %
195Number of NoFollow External Links   Authority-0.1140317 %75 %
196Exact Matches in H1 Tags   Relevancy-0.112112 %80 %
197Has Meta Twitter Description   Authority-0.111130 %58 %
198Has Apple Touch Icon   Technology-0.111151 %72 %
199Is Category Page   Other-0.111115 %66 %
200Variations in ID Attributes   Relevancy-0.11487211 %80 %