Measures 146741 SEO Factors

145019 Built-In SEO Factors

135879 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-0.22134533283 %79 %
2Entities in Title Tag   Relevancy-0.217369 %94 %
3Number of Distinct Entities Used   Diversity-0.211063079 %95 %
4Search Result Domain is .com, .net, or .org   Other-0.21115 %74 %
5Load Time Milliseconds   Performance-0.2132075147784 %91 %
6Number of Top 200 Shared Factors Used   Diversity-0.21523898 %93 %
7Number of Top 100 Shared Factors Used   Diversity-0.21392998 %93 %
8Number of Unique Variations Used   Diversity-0.2129778 %87 %
9Search Result Domain is .com   Other-0.2114 %73 %
10Number of Top 50 Shared Factors Used   Diversity-0.2171298 %92 %
11Entities in the HTML Tag   Relevancy-0.286615375 %95 %
12Entities in Sentences   Relevancy-0.274515072 %95 %
13Entities in H1 Tags-0.196257 %91 %
14Number of Referring Domains   Authority-0.19170812451 %69 %
15Variations in H1-H6 Tags   Relevancy-0.19195764 %87 %
16Variations in H1, H2, and H3 Tags   Relevancy-0.19179663 %86 %
17Variations in Div Tags   Relevancy-0.184488813172 %91 %
18Variations in Body Tags   Relevancy-0.1816618031077 %89 %
19Number of Backlinks   Authority-0.18124727599351 %70 %
20Variations in H1 and H2 Tags   Relevancy-0.1862460 %86 %
21Entities in H2 Tags-0.1831754 %92 %
22Variations in P Tags   Relevancy-0.18300804765 %89 %
23Variations in HTML Tags   Relevancy-0.1816618030676 %90 %
24Number of Do Follow Backlinks   Authority-0.18122239526946 %69 %
25Number of Factors Used   Diversity-0.1837517998 %89 %
26Variations in Sentences   Relevancy-0.1875843770 %89 %
27Variations in LI Tags   Relevancy-0.18524205164 %88 %
28Term Frequency   Relevancy-0.175376 %88 %
29Variations in Search Result Document File Name   Relevancy-0.176143 %80 %
30Entities in H3 Tags-0.1743846 %92 %
31Variations in Search Result Link Text   Relevancy-0.173279 %82 %
32Variations in Search Result Display URL   Relevancy-0.173279 %82 %
33Variation Count in Top 30KB   Relevancy-0.1739482064 %84 %
34LSI Words in Sentences   Relevancy-0.17370377565 %94 %
35Variations in the Title Tag   Relevancy-0.1711263 %85 %
36Variations in A Tags   Relevancy-0.1766172564 %86 %
37Leading Variations in H1-H6 Tags   Relevancy-0.1721244 %86 %
38Unabridged Word Count   Size-0.1723497186284 %88 %
39Word Count   Size-0.176250146384 %87 %
40Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1720241 %86 %
41Clean Text Kilobytes   Size-0.171381376 %88 %
42Number of HTML Tags   Size-0.173693108384 %87 %
43Clean Keyword Density in the HTML Tag   Relevancy-0.17165368 %80 %
44Variations in Search Result URL Path   Relevancy-0.177145 %81 %
45Number of Images   Size-0.173063276 %88 %
46Number of No Follow Backlinks   Authority-0.172706172039 %67 %
47Variations in H1 Tags   Relevancy-0.178153 %85 %
48Entities in Meta Description Tag   Relevancy-0.178359 %90 %
49Has Entities in H1 Tags   Relevancy-0.161158 %87 %
50Number of Images with ALT Text   Size-0.162792272 %86 %
51Number of Includes   Technology-0.16552781 %79 %
52Variations in H2 Tags   Relevancy-0.1654346 %84 %
53Search Result Number of Dirs in Path   Other-0.164273 %76 %
54Variations in First 100 Words   Relevancy-0.16151662 %84 %
55Number of P Tags   Size-0.161353975 %88 %
56Number of Heading Tags   Size-0.16672375 %86 %
57Variations in the Canonical URL   Relevancy-0.1641247 %83 %
58Variations in Meta Description   Relevancy-0.1640253 %83 %
59Title Tag Has Entities   Relevancy-0.161169 %87 %
60Exact Matches in the HTML Tag   Relevancy-0.168261130 %83 %
61LSI Words in Title Tag   Relevancy-0.1616667 %93 %
62Variations in A Tag HREF Attributes   Relevancy-0.1629773958 %90 %
63Variation Density in Top 30KB   Relevancy-0.16295259 %82 %
64Variations in ALT Attributes   Relevancy-0.16417744 %83 %
65Variations in Distinct A Tag HREF Attributes   Relevancy-0.1619842458 %89 %
66Number of HTTPS Links   Authority-0.1641914880 %86 %
67Number of DoFollow Links   Authority-0.1640914580 %86 %
68Number of Links   Authority-0.1642214980 %86 %
69Variations in Main Tags   Relevancy-0.16145746436 %85 %
70Variations in Span Tags   Relevancy-0.16834950 %88 %
71Number of Internal Links   Authority-0.1640513480 %86 %
72LSI Words in H1 Tags   Relevancy-0.1618557 %92 %
73Percentage of DoFollow Links   Authority-0.16988280 %87 %
74TF/IDF   Relevancy-0.161156 %85 %
75Leading Variations in Title Tag   Relevancy-0.151130 %80 %
76Variations in OpenGraph Description   Relevancy-0.154249 %79 %
77Number of Facebook Pages   Authority-0.1516259 %81 %
78Number of External Links   Authority-0.151061577 %85 %
79Number of H1 Tags   Size-0.1511270 %87 %
80Number of Forms   Technology-0.1519254 %81 %
81Percentage of DoFollow Internal Links   Authority-0.15907279 %85 %
82Number of DoFollow External Links   Authority-0.15661376 %84 %
83Variations in OpenGraph Title   Relevancy-0.157153 %78 %
84Variations in Absolute URLs   Relevancy-0.1595175659 %87 %
85Number of CSS Includes   Technology-0.15261073 %78 %
86Variations in Search Result URL   Relevancy-0.1517253 %76 %
87Variations in Script Tags   Relevancy-0.158975612261 %83 %
88Number of HTML Comments   Size-0.157075672 %85 %
89Has Entities in H2 Tags   Relevancy-0.151155 %85 %
90Number of H2 Tags   Size-0.1521768 %86 %
91Number of Images without ALT Text   Size-0.15651158 %86 %
92Leading Variations in H1 Tags   Relevancy-0.151126 %80 %
93Number of Sentences   Size-0.1569713182 %83 %
94Has Form   Technology-0.151153 %77 %
95Has JSON-LD Schema Markup   Relevancy-0.151154 %77 %
96Average Words Per Sentence   Size-0.153183178 %81 %
97Has Meta Charset   Technology-0.141174 %83 %
98LSI Words in H2 Tags   Relevancy-0.14922155 %92 %
99Number of H3 Tags   Size-0.1433961 %83 %
100Flesch Kincaid Reading Grade Level   Other-0.146295 %87 %
101Exact Matches in H1-H6 Tags   Relevancy-0.1413118 %82 %
102Number of JavaScript Includes   Technology-0.14441881 %80 %
103LSI Words in Meta Description Tag   Relevancy-0.14361055 %91 %
104Variations in Nav Tags   Relevancy-0.1483872845 %83 %
105Variations in H3 Tags   Relevancy-0.14118335 %83 %
106Entities in H4 Tags-0.1419222 %88 %
107Search Result Domain Length   Size-0.14271783 %79 %
108Search Result Host Length   Size-0.14271783 %79 %
109Number Of JSON-LD Types   Relevancy-0.141501457 %82 %
110Inline CSS Kilobytes   Size-0.141916265 %81 %
111Number of Absolute URLs   Authority-0.1499029083 %79 %
112Variations in Section Tags   Relevancy-0.1410471736 %83 %
113Has Entities in H3 Tags   Relevancy-0.141147 %84 %
114Page Size Kilobytes   Size-0.14110532483 %76 %
115Has Meta Viewport   Technology-0.141181 %82 %
116Percentage of DoFollow External Links   Authority-0.14301174 %79 %
117Variations in Footer Tags   Relevancy-0.1460121035 %83 %
118Variations making whole H1-H6 Tags   Relevancy-0.142116 %78 %
119Search Result Uses HTTPS   Other-0.141183 %84 %
120Variations making whole H1, H2, and H3 Tags   Relevancy-0.142114 %78 %
121Number of Questions   Size-0.14811268 %78 %
122Number of Questions In Headings   Size-0.148237 %83 %
123Has Canonical URL   Authority-0.141171 %79 %
124Leading Variations in H2 Tags   Relevancy-0.138121 %82 %
125Number of Prices   Size-0.1329627570 %80 %
126Number of Social Pages   Authority-0.1330465 %81 %
127LSI Words in H3 Tags   Relevancy-0.131272248 %90 %
128Number of LinkedIn Pages   Authority-0.137133 %76 %
129Number of Instagram Pages   Authority-0.1312245 %78 %
130Is Home Page   Other-0.131120 %45 %
131Number of Email Addresses   Trust-0.13280544 %79 %
132Word Count in Meta Description   Size-0.13381967 %77 %
133Meta Description Length   Size-0.1324211867 %78 %
134Has Privacy Policy   Trust-0.131160 %73 %
135Has Email   Trust-0.131144 %71 %
136Has FavIcon   Technology-0.131175 %77 %
137Uses JSON-LD name   Other-0.131153 %76 %
138Search Result URL Length   Size-0.13936298 %62 %
139Exact Matches in Top 30KB   Relevancy-0.1324217 %78 %
140Meta Description Tag Has Entities   Relevancy-0.131159 %80 %
141Number of Nofollow Links   Authority-0.1346525 %76 %
142Number of US Phone Numbers   Trust-0.136671243 %80 %
143Has Meta Description   Relevancy-0.131166 %74 %
144Headings Has Question   Other-0.131136 %77 %
145Has OpenGraph Type   Relevancy-0.131162 %70 %
146Number of Facebook Accounts   Authority-0.133129 %78 %
147Exact Matches in Sentences   Relevancy-0.1342320 %83 %
148Variations in Meta Twitter Content   Relevancy-0.132125 %69 %
149Inline JavaScript Kilobytes   Size-0.1363412180 %72 %
150Variations in the last 100 words   Relevancy-0.13149345 %80 %
151Title Length   Size-0.131225082 %77 %
152Variations Making Whole LI Tags   Relevancy-0.135124 %76 %
153Number of Social Accounts   Authority-0.1310243 %78 %
154Is Store Page   Other-0.131146 %68 %
155Has Meta Twitter Card   Authority-0.131153 %65 %
156Variations in Meta Twitter Description   Relevancy-0.1323123 %73 %
157Number of H4 Tags   Size-0.1320437 %81 %
158Title Word Count   Size-0.1318882 %76 %
159Variations making whole A Tags   Relevancy-0.1268129 %76 %
160Has US Phone Number   Trust-0.121142 %71 %
161Variations in TITLE Attributes   Relevancy-0.12268535 %80 %
162Variations in I Tags   Relevancy-0.12108322 %79 %
163Is Purchase Page   Other-0.121147 %66 %
164Has OpenGraph Image   Relevancy-0.121154 %68 %
165Number of Questions In H3 Tags   Size-0.125117 %76 %
166Variations in Strong Tags   Relevancy-0.1262225 %79 %
167Has Contact Page   Trust-0.121163 %70 %
168Has Schema Markup   Relevancy-0.121164 %75 %
169Has Terms of Service   Trust-0.121141 %66 %
170Uses JSON-LD url   Other-0.121147 %75 %
171Uses JSON-LD CollectionPage   Other-0.12114 %32 %
172Uses Schema name   Other-0.121161 %71 %
173Exact Matches in Title Tag   Relevancy-0.122116 %80 %
174Variations making whole H1 Tags   Relevancy-0.12118 %78 %
175Variations Making Whole Span Tags   Relevancy-0.127119 %80 %
176Is Pagination Page   Other-0.121119 %65 %
177Uses Schema collectionpage   Other-0.12114 %32 %
178Variations in H4-H6 Tags   Relevancy-0.1216117 %80 %
179Uses Schema url   Other-0.121156 %68 %
180Leading Variations in H3 Tags   Relevancy-0.1212115 %77 %
181Uses JSON-LD ItemList   Other-0.12114 %43 %
182Has Entities in H4 Tags   Relevancy-0.121123 %78 %
183Percentage of NoFollow Links   Authority-0.1215222 %74 %
184Uses Schema itemlist   Other-0.12114 %45 %
185Has Google Verify   Technology-0.121122 %67 %
186Uses JSON-LD ListItem   Other-0.121134 %71 %
187Variations in Button Tags   Relevancy-0.12256549 %80 %
188Number of Questions In H2 Tags   Size-0.124123 %74 %
189Is Article Page   Other-0.121142 %67 %
190Uses Schema sku   Other-0.12115 %27 %
191Number of Twitter Accounts   Authority-0.122125 %71 %
192Number of NoFollow External Links   Authority-0.1140317 %75 %
193Uses Schema organization   Other-0.111135 %67 %
194Variations in ID Attributes   Relevancy-0.11487212 %80 %
195Uses JSON-LD description   Other-0.111141 %70 %
196Has Meta Twitter Description   Authority-0.111130 %59 %
197Exact Matches in H1 Tags   Relevancy-0.111112 %80 %
198Is Category Page   Other-0.111115 %67 %
199Is OpenGraph Type Article   Technology-0.111132 %59 %
200Has Meta Twitter Title   Authority-0.111132 %59 %