Measures 146706 SEO Factors

144984 Built-In SEO Factors

135844 On-page SEO Factors

9140 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-0.23134533282 %78 %
2Entities in Title Tag   Relevancy-0.217369 %94 %
3Number of Distinct Entities Used   Diversity-0.211063079 %95 %
4Load Time Milliseconds   Performance-0.2132075148384 %91 %
5Search Result Domain is .com, .net, or .org   Other-0.21115 %74 %
6Number of Unique Variations Used   Diversity-0.2129778 %87 %
7Number of Top 200 Shared Factors Used   Diversity-0.21523898 %93 %
8Number of Top 100 Shared Factors Used   Diversity-0.21392998 %93 %
9Search Result Domain is .com   Other-0.2115 %73 %
10Number of Top 50 Shared Factors Used   Diversity-0.2171298 %92 %
11Entities in the HTML Tag   Relevancy-0.274615475 %95 %
12Entities in Sentences   Relevancy-0.266915171 %95 %
13Entities in H1 Tags-0.196257 %91 %
14Variations in H1-H6 Tags   Relevancy-0.1924764 %87 %
15Variations in H1, H2, and H3 Tags   Relevancy-0.1921663 %86 %
16Number of Referring Domains   Authority-0.19170812551 %69 %
17Variations in Div Tags   Relevancy-0.1968710472 %91 %
18Variations in H1 and H2 Tags   Relevancy-0.1911460 %85 %
19Variations in Body Tags   Relevancy-0.19179921177 %89 %
20Entities in H2 Tags-0.1831754 %92 %
21Variations in P Tags   Relevancy-0.181373065 %89 %
22Variations in HTML Tags   Relevancy-0.18179920876 %91 %
23Number of Backlinks   Authority-0.18124727615151 %70 %
24Number of Factors Used   Diversity-0.1837517998 %89 %
25Number of Do Follow Backlinks   Authority-0.18122239539047 %69 %
26Variations in Sentences   Relevancy-0.182153270 %88 %
27Variations in LI Tags   Relevancy-0.181722064 %89 %
28Variations in Search Result Document File Name   Relevancy-0.174143 %79 %
29Term Frequency   Relevancy-0.174376 %88 %
30Variations in Search Result Link Text   Relevancy-0.173279 %82 %
31Variations in Search Result Display URL   Relevancy-0.173279 %82 %
32Variations in the Title Tag   Relevancy-0.173263 %85 %
33Variations in A Tags   Relevancy-0.172552164 %86 %
34Entities in H3 Tags-0.1743846 %92 %
35Variation Count in Top 30KB   Relevancy-0.17771864 %85 %
36Unabridged Word Count   Size-0.1710284185384 %88 %
37LSI Words in Sentences   Relevancy-0.17370376964 %94 %
38Word Count   Size-0.176250146784 %87 %
39Clean Text Kilobytes   Size-0.17661376 %88 %
40Leading Variations in H1-H6 Tags   Relevancy-0.1714244 %86 %
41Clean Keyword Density in the HTML Tag   Relevancy-0.1716367 %80 %
42Number of HTML Tags   Size-0.173693108684 %87 %
43Variations in Search Result URL Path   Relevancy-0.174144 %80 %
44Number of Images   Size-0.173063376 %87 %
45Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1711241 %86 %
46Variations in H1 Tags   Relevancy-0.173153 %85 %
47Number of Includes   Technology-0.16552780 %79 %
48Entities in Meta Description Tag   Relevancy-0.168359 %90 %
49Number of No Follow Backlinks   Authority-0.162706174939 %67 %
50Number of Images with ALT Text   Size-0.162792272 %86 %
51Search Result Number of Dirs in Path   Other-0.164272 %77 %
52Variations in H2 Tags   Relevancy-0.1611346 %84 %
53Has Entities in H1 Tags   Relevancy-0.161158 %87 %
54Variations in First 100 Words   Relevancy-0.1617562 %84 %
55Number of P Tags   Size-0.161353975 %88 %
56Number of Heading Tags   Size-0.16672376 %85 %
57Variations in the Canonical URL   Relevancy-0.169247 %83 %
58Title Tag Has Entities   Relevancy-0.161169 %87 %
59Variations in Meta Description   Relevancy-0.164253 %83 %
60Variations in ALT Attributes   Relevancy-0.1655744 %83 %
61Variations in A Tag HREF Attributes   Relevancy-0.163233758 %90 %
62Variations in Distinct A Tag HREF Attributes   Relevancy-0.162442358 %90 %
63Variation Density in Top 30KB   Relevancy-0.167258 %82 %
64Number of HTTPS Links   Authority-0.1641914880 %86 %
65Number of DoFollow Links   Authority-0.1640914580 %86 %
66Number of Links   Authority-0.1642215080 %86 %
67Exact Matches in the HTML Tag   Relevancy-0.168261129 %82 %
68Variations in Main Tags   Relevancy-0.164845536 %85 %
69LSI Words in Title Tag   Relevancy-0.1616666 %94 %
70Leading Variations in Title Tag   Relevancy-0.161130 %80 %
71TF/IDF   Relevancy-0.161156 %85 %
72Percentage of DoFollow Links   Authority-0.16988280 %87 %
73Variations in Span Tags   Relevancy-0.1641950 %87 %
74Number of Internal Links   Authority-0.1640513580 %86 %
75Number of Facebook Pages   Authority-0.1616259 %80 %
76Variations in OpenGraph Description   Relevancy-0.164249 %79 %
77Number of External Links   Authority-0.151061577 %85 %
78Variations in OpenGraph Title   Relevancy-0.153153 %78 %
79LSI Words in H1 Tags   Relevancy-0.1518456 %93 %
80Number of Forms   Technology-0.1519254 %81 %
81Number of H1 Tags   Size-0.1511270 %87 %
82Variations in Absolute URLs   Relevancy-0.153104959 %87 %
83Percentage of DoFollow Internal Links   Authority-0.15907279 %85 %
84Number of DoFollow External Links   Authority-0.15661476 %84 %
85Variations in Search Result URL   Relevancy-0.154253 %76 %
86Number of CSS Includes   Technology-0.15261073 %78 %
87Variations in Script Tags   Relevancy-0.158536561 %83 %
88Number of HTML Comments   Size-0.157075572 %84 %
89Number of Images without ALT Text   Size-0.15651158 %85 %
90Has Entities in H2 Tags   Relevancy-0.151154 %85 %
91Number of H2 Tags   Size-0.1521768 %86 %
92Number of Sentences   Size-0.1569713082 %83 %
93Has Form   Technology-0.151153 %76 %
94Leading Variations in H1 Tags   Relevancy-0.151126 %80 %
95Has JSON-LD Schema Markup   Relevancy-0.151154 %77 %
96Average Words Per Sentence   Size-0.152293178 %81 %
97Has Meta Charset   Technology-0.151174 %83 %
98Flesch Kincaid Reading Grade Level   Other-0.146295 %86 %
99Number of JavaScript Includes   Technology-0.14441881 %80 %
100Number of H3 Tags   Size-0.1433961 %84 %
101Variations in Nav Tags   Relevancy-0.142372346 %83 %
102Exact Matches in H1-H6 Tags   Relevancy-0.1413118 %82 %
103LSI Words in H2 Tags   Relevancy-0.14922054 %91 %
104Search Result Domain Length   Size-0.14271783 %79 %
105LSI Words in Meta Description Tag   Relevancy-0.14361054 %91 %
106Search Result Host Length   Size-0.14271783 %79 %
107Variations in H3 Tags   Relevancy-0.1416335 %83 %
108Entities in H4 Tags-0.1419222 %88 %
109Variations in Section Tags   Relevancy-0.14911636 %83 %
110Inline CSS Kilobytes   Size-0.141916165 %82 %
111Number Of JSON-LD Types   Relevancy-0.141501457 %82 %
112Has Meta Viewport   Technology-0.141181 %82 %
113Number of Absolute URLs   Authority-0.1499028983 %79 %
114Number of Questions   Size-0.14811267 %77 %
115Page Size Kilobytes   Size-0.14110532183 %76 %
116Percentage of DoFollow External Links   Authority-0.14301174 %79 %
117Has Entities in H3 Tags   Relevancy-0.141146 %83 %
118Search Result Uses HTTPS   Other-0.141183 %84 %
119Has Canonical URL   Authority-0.141171 %79 %
120Variations in Footer Tags   Relevancy-0.14135635 %82 %
121Variations making whole H1-H6 Tags   Relevancy-0.142116 %77 %
122Number of Questions In Headings   Size-0.148236 %83 %
123Variations making whole H1, H2, and H3 Tags   Relevancy-0.142114 %78 %
124Number of Prices   Size-0.1329627470 %81 %
125Leading Variations in H2 Tags   Relevancy-0.136121 %81 %
126Number of Social Pages   Authority-0.1330465 %81 %
127Number of LinkedIn Pages   Authority-0.137133 %76 %
128Number of Instagram Pages   Authority-0.1312245 %78 %
129Number of Email Addresses   Trust-0.13280543 %79 %
130Is Home Page   Other-0.131120 %45 %
131Word Count in Meta Description   Size-0.13381967 %78 %
132Meta Description Length   Size-0.1321711867 %78 %
133Has Email   Trust-0.131143 %71 %
134Search Result URL Length   Size-0.13936398 %61 %
135Has FavIcon   Technology-0.131175 %77 %
136Has Privacy Policy   Trust-0.131160 %74 %
137LSI Words in H3 Tags   Relevancy-0.131272248 %90 %
138Number of Nofollow Links   Authority-0.1346525 %77 %
139Has OpenGraph Type   Relevancy-0.131162 %70 %
140Meta Description Tag Has Entities   Relevancy-0.131159 %80 %
141Variations in Meta Twitter Content   Relevancy-0.132125 %69 %
142Number of US Phone Numbers   Trust-0.136671243 %80 %
143Uses JSON-LD name   Other-0.131153 %76 %
144Has Meta Description   Relevancy-0.131166 %73 %
145Number of Facebook Accounts   Authority-0.133129 %78 %
146Variations in the last 100 words   Relevancy-0.1315345 %80 %
147Has Meta Twitter Card   Authority-0.131152 %65 %
148Headings Has Question   Other-0.131136 %76 %
149Variations in Meta Twitter Description   Relevancy-0.134123 %73 %
150Variations Making Whole LI Tags   Relevancy-0.135124 %76 %
151Exact Matches in Top 30KB   Relevancy-0.1324216 %77 %
152Is Store Page   Other-0.131146 %68 %
153Exact Matches in Sentences   Relevancy-0.1342220 %83 %
154Has OpenGraph Image   Relevancy-0.131154 %68 %
155Inline JavaScript Kilobytes   Size-0.1360912080 %72 %
156Number of Social Accounts   Authority-0.1310243 %78 %
157Title Length   Size-0.131225082 %78 %
158Variations making whole A Tags   Relevancy-0.138129 %76 %
159Number of H4 Tags   Size-0.1320437 %80 %
160Is Purchase Page   Other-0.131147 %66 %
161Variations in I Tags   Relevancy-0.1317322 %79 %
162Has US Phone Number   Trust-0.131142 %71 %
163Title Word Count   Size-0.1318881 %76 %
164Variations in TITLE Attributes   Relevancy-0.1287535 %80 %
165Has Contact Page   Trust-0.121163 %70 %
166Has Schema Markup   Relevancy-0.121164 %74 %
167Has Terms of Service   Trust-0.121141 %67 %
168Number of Questions In H3 Tags   Size-0.125117 %76 %
169Variations in Strong Tags   Relevancy-0.1215225 %79 %
170Uses JSON-LD CollectionPage   Other-0.12114 %32 %
171Uses Schema name   Other-0.121160 %71 %
172Uses JSON-LD url   Other-0.121147 %75 %
173Uses Schema collectionpage   Other-0.12115 %32 %
174Is Pagination Page   Other-0.121119 %65 %
175Exact Matches in Title Tag   Relevancy-0.122115 %79 %
176Variations making whole H1 Tags   Relevancy-0.12118 %77 %
177Variations Making Whole Span Tags   Relevancy-0.127119 %80 %
178Variations in H4-H6 Tags   Relevancy-0.1216117 %79 %
179Uses Schema url   Other-0.121156 %68 %
180Percentage of NoFollow Links   Authority-0.1215222 %74 %
181Has Meta Twitter Description   Authority-0.121130 %59 %
182Has Google Verify   Technology-0.121122 %66 %
183Number of Twitter Accounts   Authority-0.122125 %70 %
184Number of Questions In H2 Tags   Size-0.124123 %74 %
185Variations in ID Attributes   Relevancy-0.1216212 %80 %
186Has Entities in H4 Tags   Relevancy-0.121123 %77 %
187Leading Variations in H3 Tags   Relevancy-0.125115 %76 %
188Number of NoFollow External Links   Authority-0.1240317 %76 %
189Has Meta Twitter Title   Authority-0.121132 %59 %
190Uses Schema organization   Other-0.121135 %66 %
191Uses JSON-LD ItemList   Other-0.12114 %43 %
192Uses JSON-LD ListItem   Other-0.121134 %70 %
193Is Article Page   Other-0.121142 %66 %
194Uses Schema itemlist   Other-0.11114 %44 %
195Is Category Page   Other-0.111115 %66 %
196Uses Schema sku   Other-0.11115 %26 %
197Variations in Button Tags   Relevancy-0.1112529 %80 %
198Uses JSON-LD description   Other-0.111141 %70 %
199Variations in H4 Tags   Relevancy-0.115113 %77 %
200Has Apple Touch Icon   Technology-0.111152 %73 %