Measures 143031 SEO Factors

141309 Built-In SEO Factors

132241 On-page SEO Factors

9068 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 2025-8     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-0.25144129779 %79 %
2Load Time Milliseconds   Performance-0.2438092200781 %94 %
3Search Result Domain is .com, .net, or .org   Other-0.24115 %79 %
4Number of Unique Variations Used   Diversity-0.2428775 %88 %
5Number of Top 100 Shared Factors Used   Diversity-0.24402995 %92 %
6Number of Top 200 Shared Factors Used   Diversity-0.23533995 %91 %
7Search Result Domain is .com   Other-0.23115 %80 %
8Number of Top 50 Shared Factors Used   Diversity-0.23181293 %90 %
9Number of Distinct Entities Used   Diversity-0.23672873 %92 %
10Entities in Title Tag   Relevancy-0.2217364 %90 %
11Variations in Body Tags   Relevancy-0.226149027074 %89 %
12Variations in HTML Tags   Relevancy-0.226149026673 %91 %
13Variations in Div Tags   Relevancy-0.211921812570 %91 %
14Variations in P Tags   Relevancy-0.2113463266 %89 %
15Variations in H1-H6 Tags   Relevancy-0.21158865 %87 %
16Variations in Sentences   Relevancy-0.2117123468 %89 %
17Variations in H1, H2, and H3 Tags   Relevancy-0.21115764 %86 %
18Number of Referring Domains   Authority-0.2195398746 %72 %
19Number of Factors Used   Diversity-0.2156218295 %88 %
20Variations in H1 and H2 Tags   Relevancy-0.2153462 %86 %
21Number of Includes   Technology-0.2582575 %80 %
22Term Frequency   Relevancy-0.25373 %89 %
23Number of Backlinks   Authority-0.2823560507845 %72 %
24Number of Do Follow Backlinks   Authority-0.2769488427241 %71 %
25Entities in Sentences   Relevancy-0.267714267 %94 %
26Entities in the HTML Tag   Relevancy-0.267914568 %94 %
27Variations in LI Tags   Relevancy-0.28212264 %87 %
28Variations in Search Result Link Text   Relevancy-0.1911276 %78 %
29Variations in Search Result Display URL   Relevancy-0.1911276 %79 %
30Variations in the Title Tag   Relevancy-0.1910262 %83 %
31Variations in Search Result Document File Name   Relevancy-0.194147 %79 %
32Variations in A Tags   Relevancy-0.1926952464 %85 %
33Number of CSS Includes   Technology-0.1925968 %77 %
34Clean Keyword Density in the HTML Tag   Relevancy-0.19153366 %81 %
35Variations in H1 Tags   Relevancy-0.199154 %81 %
36Number of Facebook Pages   Authority-0.1922258 %80 %
37Variations in Search Result URL Path   Relevancy-0.194249 %80 %
38Leading Variations in H1-H6 Tags   Relevancy-0.1914245 %85 %
39Exact Matches in the HTML Tag   Relevancy-0.185541131 %86 %
40Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1811243 %85 %
41Number of No Follow Backlinks   Authority-0.1812484483134 %68 %
42Entities in H2 Tags-0.1837751 %89 %
43LSI Words in Sentences   Relevancy-0.18649176165 %94 %
44LSI Words in Title Tag   Relevancy-0.1832663 %92 %
45Variations in Meta Description   Relevancy-0.1827252 %82 %
46Variation Count in Top 30KB   Relevancy-0.1839902364 %83 %
47Variations in Distinct A Tag HREF Attributes   Relevancy-0.1810302860 %87 %
48Variations in A Tag HREF Attributes   Relevancy-0.1813904460 %86 %
49Variations in H2 Tags   Relevancy-0.1845346 %85 %
50Variations in First 100 Words   Relevancy-0.18143662 %81 %
51Entities in H1 Tags-0.1816254 %85 %
52Number of HTML Tags   Size-0.186126110581 %86 %
53Variations in OpenGraph Title   Relevancy-0.187151 %77 %
54Has JSON-LD Schema Markup   Relevancy-0.181153 %76 %
55Variations in Script Tags   Relevancy-0.18178087859 %88 %
56Entities in Meta Description Tag   Relevancy-0.1820354 %86 %
57Search Result Number of Dirs in Path   Other-0.184271 %78 %
58Variation Density in Top 30KB   Relevancy-0.18246258 %82 %
59Variations in the Canonical URL   Relevancy-0.1726250 %81 %
60Unabridged Word Count   Size-0.1711084196181 %87 %
61Word Count   Size-0.179175156981 %86 %
62TF/IDF   Relevancy-0.171157 %83 %
63Number of Sentences   Size-0.1769313180 %85 %
64Clean Text Kilobytes   Size-0.17811376 %87 %
65Number of Images   Size-0.174093577 %85 %
66Variations in Span Tags   Relevancy-0.17436949 %88 %
67Variations in Main Tags   Relevancy-0.17122566936 %85 %
68Page Size Kilobytes   Size-0.17125527580 %85 %
69Number of Images with ALT Text   Size-0.173982472 %86 %
70Variations in Search Result URL   Relevancy-0.1714259 %75 %
71Variations in ALT Attributes   Relevancy-0.17178744 %83 %
72Number of P Tags   Size-0.172514276 %84 %
73Entities in H3 Tags-0.1776743 %89 %
74Variations in OpenGraph Description   Relevancy-0.1728247 %80 %
75Variations in Absolute URLs   Relevancy-0.1741096161 %88 %
76Number of HTTPS Links   Authority-0.1778515178 %83 %
77Number of DoFollow Links   Authority-0.1756314878 %83 %
78Number of Links   Authority-0.1783715378 %82 %
79Number of Instagram Pages   Authority-0.1711242 %80 %
80Number of Internal Links   Authority-0.1758613677 %82 %
81Percentage of DoFollow Links   Authority-0.171008378 %88 %
82Leading Variations in Title Tag   Relevancy-0.161131 %81 %
83Number of LinkedIn Pages   Authority-0.1612133 %76 %
84Title Tag Has Entities   Relevancy-0.161165 %83 %
85Percentage of DoFollow Internal Links   Authority-0.16917277 %81 %
86Leading Variations in H1 Tags   Relevancy-0.162128 %81 %
87Number of External Links   Authority-0.162641874 %83 %
88LSI Words in H1 Tags   Relevancy-0.1618556 %89 %
89Number of DoFollow External Links   Authority-0.161661573 %82 %
90Inline JavaScript Kilobytes   Size-0.166408077 %82 %
91Number of Heading Tags   Size-0.162732377 %84 %
92Has Entities in H1 Tags   Relevancy-0.161155 %82 %
93Number of Questions   Size-0.16551165 %83 %
94LSI Words in Meta Description Tag   Relevancy-0.16431053 %89 %
95Variations in Nav Tags   Relevancy-0.1634002545 %83 %
96Exact Matches in H1-H6 Tags   Relevancy-0.1611121 %81 %
97Flesch Kincaid Reading Grade Level   Other-0.167292 %85 %
98Number of Absolute URLs   Authority-0.16139527380 %83 %
99Number of JavaScript Includes   Technology-0.16441777 %80 %
100Number of H2 Tags   Size-0.1517869 %83 %
101Variations in H3 Tags   Relevancy-0.15110334 %82 %
102Number of H1 Tags   Size-0.1520271 %81 %
103LSI Words in H2 Tags   Relevancy-0.15952255 %91 %
104Search Result Uses HTTPS   Other-0.151180 %85 %
105Inline CSS Kilobytes   Size-0.151786362 %85 %
106Number of Prices   Size-0.157687065 %85 %
107Number of Twitter Accounts   Authority-0.155128 %69 %
108Average Words Per Sentence   Size-0.154013278 %76 %
109Search Result Host Length   Size-0.15251680 %77 %
110Search Result Domain Length   Size-0.15251680 %77 %
111Number of US Phone Numbers   Trust-0.155181241 %81 %
112Exact Matches in Sentences   Relevancy-0.1561322 %86 %
113Has Meta Viewport   Technology-0.151178 %80 %
114Number of Images without ALT Text   Size-0.151001158 %81 %
115Number of Forms   Technology-0.1511255 %75 %
116Variations in Section Tags   Relevancy-0.155611837 %84 %
117Number of Social Pages   Authority-0.1541464 %79 %
118Exact Matches in Top 30KB   Relevancy-0.1521219 %79 %
119Number of Questions In Headings   Size-0.1516238 %82 %
120Number Of JSON-LD Types   Relevancy-0.151321556 %79 %
121Has Privacy Policy   Trust-0.151156 %74 %
122Number of HTML Comments   Size-0.155315072 %81 %
123Exact Matches in Title Tag   Relevancy-0.152118 %80 %
124Variations in Footer Tags   Relevancy-0.151638834 %82 %
125Number of H3 Tags   Size-0.15150961 %82 %
126Has Canonical URL   Authority-0.141169 %76 %
127Title Word Count   Size-0.1434878 %72 %
128Has Entities in H2 Tags   Relevancy-0.141152 %82 %
129Variations making whole H1-H6 Tags   Relevancy-0.143117 %78 %
130Variations Making Whole Span Tags   Relevancy-0.149120 %81 %
131Number of Facebook Accounts   Authority-0.143129 %75 %
132Percentage of DoFollow External Links   Authority-0.14531271 %80 %
133Title Length   Size-0.142374979 %73 %
134Has Contact Page   Trust-0.141162 %70 %
135Variations making whole H1, H2, and H3 Tags   Relevancy-0.142115 %78 %
136Meta Description Tag Has Entities   Relevancy-0.141155 %77 %
137Word Count in Meta Description   Size-0.14871964 %76 %
138Headings Has Question   Other-0.141138 %76 %
139Leading Variations in H2 Tags   Relevancy-0.148122 %82 %
140Meta Description Length   Size-0.1457311865 %77 %
141Has Meta Charset   Technology-0.141174 %75 %
142Has Terms of Service   Trust-0.141137 %71 %
143Uses JSON-LD name   Other-0.141151 %73 %
144Has FavIcon   Technology-0.141172 %76 %
145Has Form   Technology-0.141153 %71 %
146Number of Email Addresses   Trust-0.14138442 %76 %
147Variations in Meta Twitter Content   Relevancy-0.143123 %70 %
148Variations in Meta Twitter Description   Relevancy-0.147121 %74 %
149Has Schema Markup   Relevancy-0.141161 %72 %
150Entities in H4 Tags-0.14106220 %84 %
151Is Purchase Page   Other-0.141142 %69 %
152Variations making whole A Tags   Relevancy-0.1418129 %76 %
153Has Meta Description   Relevancy-0.141163 %73 %
154Uses Schema name   Other-0.141160 %61 %
155LSI Words in H3 Tags   Relevancy-0.146632248 %88 %
156Variations in TITLE Attributes   Relevancy-0.14676632 %82 %
157Variations in the last 100 words   Relevancy-0.14142343 %79 %
158Has US Phone Number   Trust-0.141142 %71 %
159Exact Matches in H1 Tags   Relevancy-0.131116 %78 %
160Variations in Strong Tags   Relevancy-0.1325226 %79 %
161Variations Making Whole LI Tags   Relevancy-0.138125 %77 %
162Number of Social Accounts   Authority-0.1312246 %76 %
163Has OpenGraph Type   Relevancy-0.131159 %70 %
164Number of Questions In H2 Tags   Size-0.135125 %78 %
165Has Entities in H3 Tags   Relevancy-0.131144 %80 %
166Is Store Page   Other-0.131142 %63 %
167Has OpenGraph Image   Relevancy-0.131151 %70 %
168Number of Questions In H3 Tags   Size-0.1312118 %76 %
169Number of H4 Tags   Size-0.13110436 %75 %
170Number of Nofollow Links   Authority-0.13275625 %76 %
171Search Result URL Length   Size-0.13966395 %53 %
172Has Copyright   Trust-0.131159 %71 %
173Is Home Page   Other-0.131117 %40 %
174Has Email   Trust-0.131142 %68 %
175Leading Variations in H3 Tags   Relevancy-0.135116 %77 %
176Variations making whole H1 Tags   Relevancy-0.131110 %77 %
177Has Meta Twitter Card   Authority-0.131150 %65 %
178Uses JSON-LD url   Other-0.131146 %70 %
179Exact Matches in A Tags   Relevancy-0.1356216 %82 %
180Variations in I Tags   Relevancy-0.13198423 %77 %
181Variations in H4-H6 Tags   Relevancy-0.1243217 %77 %
182Uses Schema url   Other-0.121155 %59 %
183Number Of Claimed Brands   Other-0.1245225 %70 %
184Variations in ID Attributes   Relevancy-0.12432212 %81 %
185Has HREF Lang   Technology-0.121114 %66 %
186Has Meta Twitter Description   Authority-0.121127 %62 %
187Number of HREF Lang Tags   Size-0.1222213 %72 %
188Has Meta Twitter Title   Authority-0.121128 %61 %
189Number of H5 Tags   Size-0.1225217 %74 %
190Variations in Button Tags   Relevancy-0.1295638 %79 %
191Variations in Search Result Summary   Relevancy-0.1246274 %55 %
192Uses JSON-LD image   Other-0.121116 %67 %
193Variations in Article Tags   Relevancy-0.123811324 %73 %
194Has Google Verify   Technology-0.121121 %64 %
195Uses Schema itemlist   Other-0.12114 %37 %
196Has Meta Twitter Site   Authority-0.121120 %62 %
197Uses JSON-LD price   Other-0.12114 %36 %
198Uses JSON-LD description   Other-0.121141 %66 %
199Variations in H4 Tags   Relevancy-0.1216113 %76 %
200Uses Schema listitem   Other-0.121141 %58 %