Measures 143171 SEO Factors

141449 Built-In SEO Factors

132381 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 2025-09     previous

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

NameCorrelation#1 MaxPage 1 AvgUsage %Searches %
1Search Result Domain is .com, .net, or .org   Other-0.26116 %77 %
2Load Time Milliseconds   Performance-0.2617613248277 %91 %
3Number of Unique LSI Words Used   Diversity-0.2683127776 %82 %
4Search Result Domain is .com   Other-0.25115 %78 %
5Number of Unique Variations Used   Diversity-0.2560771 %85 %
6Number of Top 100 Shared Factors Used   Diversity-0.24402891 %90 %
7Number of Top 200 Shared Factors Used   Diversity-0.24523791 %91 %
8Number of Top 50 Shared Factors Used   Diversity-0.23161290 %90 %
9Number of Distinct Entities Used   Diversity-0.22932768 %89 %
10Entities in Title Tag   Relevancy-0.2210359 %91 %
11Variations in Search Result Link Text   Relevancy-0.2218270 %78 %
12Number of Referring Domains   Authority-0.2254017946 %69 %
13Variations in Search Result Display URL   Relevancy-0.2218270 %79 %
14Number of Factors Used   Diversity-0.2231317292 %84 %
15Variations in Body Tags   Relevancy-0.2210786085068 %86 %
16Variations in H1, H2, and H3 Tags   Relevancy-0.22213856 %84 %
17Variations in H1-H6 Tags   Relevancy-0.213151057 %84 %
18Variations in Div Tags   Relevancy-0.215368737364 %87 %
19Number of Includes   Technology-0.21582572 %80 %
20Variations in HTML Tags   Relevancy-0.2110786083067 %88 %
21Number of Backlinks   Authority-0.21806048766246 %70 %
22Variations in H1 and H2 Tags   Relevancy-0.2173555 %84 %
23Number of Do Follow Backlinks   Authority-0.21753114530042 %69 %
24Variations in Sentences   Relevancy-0.2130145360 %86 %
25Variations in P Tags   Relevancy-0.2154735359 %86 %
26Term Frequency   Relevancy-0.26367 %88 %
27Number of CSS Includes   Technology-0.221964 %75 %
28Variations in the Title Tag   Relevancy-0.238256 %86 %
29LSI Words in Title Tag   Relevancy-0.218663 %91 %
30Leading Variations in H1-H6 Tags   Relevancy-0.241240 %85 %
31Number of No Follow Backlinks   Authority-0.2646488219333 %64 %
32Variations in LI Tags   Relevancy-0.256873457 %84 %
33Leading Variations in H1, H2, and H3 Tags   Relevancy-0.224238 %86 %
34LSI Words in Sentences   Relevancy-0.2267675864 %90 %
35Has JSON-LD Schema Markup   Relevancy-0.21148 %72 %
36Clean Keyword Density in the HTML Tag   Relevancy-0.19193660 %80 %
37Number of Facebook Pages   Authority-0.196253 %76 %
38Variations in H1 Tags   Relevancy-0.1917148 %81 %
39Variations in A Tags   Relevancy-0.1954375158 %84 %
40Variations in Meta Description   Relevancy-0.1959247 %81 %
41Variations in Search Result Document File Name   Relevancy-0.1919139 %78 %
42Entities in the HTML Tag   Relevancy-0.1949212961 %92 %
43Variation Count in Top 30KB   Relevancy-0.1856227159 %81 %
44Variations in Script Tags   Relevancy-0.183112828653 %86 %
45Variations in H2 Tags   Relevancy-0.1866440 %83 %
46Entities in Sentences   Relevancy-0.1848912760 %92 %
47Variation Density in Top 30KB   Relevancy-0.18371651 %78 %
48Entities in H2 Tags-0.1842746 %87 %
49Exact Matches in the HTML Tag   Relevancy-0.186121626 %82 %
50Percentage of DoFollow Links   Authority-0.181008173 %86 %
51Word Count   Size-0.184520148676 %82 %
52Number of HTML Tags   Size-0.183738108377 %84 %
53Number of P Tags   Size-0.181174071 %80 %
54Variations in Main Tags   Relevancy-0.181902517034 %83 %
55Variations in OpenGraph Title   Relevancy-0.1816147 %80 %
56Variations in Search Result URL Path   Relevancy-0.1818141 %78 %
57Unabridged Word Count   Size-0.185164185176 %83 %
58Entities in H3 Tags-0.1857738 %87 %
59Number of Sentences   Size-0.1857712274 %83 %
60Percentage of DoFollow Internal Links   Authority-0.18976972 %80 %
61Entities in H1 Tags-0.1810249 %83 %
62Entities in Meta Description Tag   Relevancy-0.1811349 %85 %
63Clean Text Kilobytes   Size-0.18421272 %82 %
64Number of Images   Size-0.182183772 %82 %
65Number of Instagram Pages   Authority-0.1810242 %77 %
66Leading Variations in Title Tag   Relevancy-0.181127 %83 %
67Search Result Number of Dirs in Path   Other-0.184267 %78 %
68Number of Heading Tags   Size-0.17812271 %81 %
69Number of Images with ALT Text   Size-0.172082668 %80 %
70Variations in ALT Attributes   Relevancy-0.175501140 %79 %
71Variations in OpenGraph Description   Relevancy-0.17223243 %78 %
72Leading Variations in H1 Tags   Relevancy-0.171125 %82 %
73Page Size Kilobytes   Size-0.17102427676 %85 %
74Number of Absolute URLs   Authority-0.1796928476 %80 %
75LSI Words in Meta Description Tag   Relevancy-0.17541051 %87 %
76Variations in First 100 Words   Relevancy-0.17188755 %83 %
77Number of DoFollow Links   Authority-0.1749514373 %81 %
78Number of Links   Authority-0.1752614873 %81 %
79LSI Words in H2 Tags   Relevancy-0.17762153 %86 %
80Number of Internal Links   Authority-0.1751013272 %82 %
81Number of HTTPS Links   Authority-0.1752514673 %83 %
82Variations in Absolute URLs   Relevancy-0.17864912152 %86 %
83Flesch Kincaid Reading Grade Level   Other-0.178188 %83 %
84LSI Words in H1 Tags   Relevancy-0.1732555 %86 %
85Inline JavaScript Kilobytes   Size-0.175488073 %82 %
86Variations in Span Tags   Relevancy-0.1712951743 %87 %
87Variations in Distinct A Tag HREF Attributes   Relevancy-0.1722603451 %87 %
88Number of LinkedIn Pages   Authority-0.173127 %72 %
89Number of Questions   Size-0.17501057 %78 %
90TF/IDF   Relevancy-0.172148 %84 %
91Variations in H3 Tags   Relevancy-0.17170429 %81 %
92Title Tag Has Entities   Relevancy-0.171159 %83 %
93Has Meta Viewport   Technology-0.171174 %79 %
94Variations in A Tag HREF Attributes   Relevancy-0.1741195551 %87 %
95Inline CSS Kilobytes   Size-0.172115958 %82 %
96Number of DoFollow External Links   Authority-0.16661469 %77 %
97Number of H2 Tags   Size-0.1628764 %79 %
98Variations in Search Result URL   Relevancy-0.1637249 %73 %
99Number of External Links   Authority-0.16671670 %77 %
100Number Of JSON-LD Types   Relevancy-0.161391351 %77 %
101Search Result Host Length   Size-0.16241677 %76 %
102Search Result Domain Length   Size-0.16241677 %76 %
103Number of H3 Tags   Size-0.1634956 %81 %
104Has Meta Charset   Technology-0.161170 %75 %
105Search Result Uses HTTPS   Other-0.161177 %79 %
106Number of H1 Tags   Size-0.1635266 %78 %
107Number of JavaScript Includes   Technology-0.16461774 %80 %
108Variations in the Canonical URL   Relevancy-0.1654242 %83 %
109Number of Prices   Size-0.167317260 %82 %
110Number of HTML Comments   Size-0.1616735368 %81 %
111LSI Words in H3 Tags   Relevancy-0.161442146 %87 %
112Number of Images without ALT Text   Size-0.16631256 %79 %
113Exact Matches in H1-H6 Tags   Relevancy-0.1612119 %80 %
114Variations in Footer Tags   Relevancy-0.1639772730 %80 %
115Number of Facebook Accounts   Authority-0.162127 %74 %
116Number of Questions In Headings   Size-0.168231 %75 %
117Number of Social Pages   Authority-0.1614458 %75 %
118Has Entities in H1 Tags   Relevancy-0.161149 %80 %
119Average Words Per Sentence   Size-0.151653473 %80 %
120Uses JSON-LD name   Other-0.151150 %69 %
121Title Word Count   Size-0.1521874 %74 %
122Uses Schema url   Other-0.151150 %54 %
123Number of Twitter Accounts   Authority-0.152124 %68 %
124Number of Forms   Technology-0.1511250 %72 %
125Percentage of DoFollow External Links   Authority-0.15291267 %76 %
126Title Length   Size-0.151304775 %76 %
127Has FavIcon   Technology-0.151167 %76 %
128Variations in Nav Tags   Relevancy-0.15113795338 %82 %
129Headings Has Question   Other-0.151132 %67 %
130Uses Schema name   Other-0.151155 %58 %
131Has Canonical URL   Authority-0.151164 %78 %
132Is Home Page   Other-0.151118 %39 %
133Has Schema Markup   Relevancy-0.151157 %72 %
134Variations in TITLE Attributes   Relevancy-0.15535829 %79 %
135Has Privacy Policy   Trust-0.151151 %70 %
136Leading Variations in H2 Tags   Relevancy-0.158120 %80 %
137Has OpenGraph Type   Relevancy-0.151155 %70 %
138Variations making whole H1-H6 Tags   Relevancy-0.153115 %77 %
139Variations in Section Tags   Relevancy-0.1523053131 %83 %
140Has Meta Description   Relevancy-0.151159 %73 %
141Variations Making Whole LI Tags   Relevancy-0.155121 %75 %
142Has Entities in H2 Tags   Relevancy-0.151146 %82 %
143Meta Description Length   Size-0.1555711460 %77 %
144Uses JSON-LD url   Other-0.151144 %66 %
145Variations making whole H1, H2, and H3 Tags   Relevancy-0.152113 %76 %
146Exact Matches in Top 30KB   Relevancy-0.1519218 %77 %
147Has Form   Technology-0.151150 %69 %
148Word Count in Meta Description   Size-0.15921960 %77 %
149Number of Email Addresses   Trust-0.1475438 %78 %
150Has Meta Twitter Card   Authority-0.141147 %64 %
151Variations in Meta Twitter Description   Relevancy-0.1455219 %72 %
152Number of US Phone Numbers   Trust-0.145461136 %83 %
153Variations in Meta Twitter Content   Relevancy-0.1416120 %72 %
154Variations making whole A Tags   Relevancy-0.1456226 %77 %
155Exact Matches in Sentences   Relevancy-0.1437319 %85 %
156Variations in Strong Tags   Relevancy-0.14146322 %76 %
157Uses Schema website   Other-0.141132 %49 %
158Has Entities in H3 Tags   Relevancy-0.141139 %80 %
159Exact Matches in Title Tag   Relevancy-0.142117 %82 %
160Number of Nofollow Links   Authority-0.1457626 %72 %
161Has Email   Trust-0.141139 %66 %
162Has OpenGraph Image   Relevancy-0.141147 %69 %
163Is Store Page   Other-0.141141 %63 %
164Number of Social Accounts   Authority-0.144242 %73 %
165Number Of Claimed Brands   Other-0.1452323 %70 %
166Leading Variations in H3 Tags   Relevancy-0.1416113 %78 %
167Variations Making Whole Span Tags   Relevancy-0.146117 %82 %
168Uses Schema listitem   Other-0.141136 %53 %
169Has Meta Twitter Title   Authority-0.141126 %63 %
170Has US Phone Number   Trust-0.141135 %70 %
171Search Result URL Length   Size-0.141036391 %50 %
172Uses JSON-LD datePublished   Other-0.141131 %54 %
173Variations in the last 100 words   Relevancy-0.14187537 %78 %
174Meta Description Tag Has Entities   Relevancy-0.141149 %77 %
175Uses JSON-LD ListItem   Other-0.141132 %64 %
176Variations in I Tags   Relevancy-0.14787920 %77 %
177Uses Schema breadcrumblist   Other-0.141136 %53 %
178Uses Schema searchaction   Other-0.141123 %48 %
179Has Meta Twitter Description   Authority-0.141125 %62 %
180Has Contact Page   Trust-0.141153 %66 %
181Uses JSON-LD description   Other-0.141137 %58 %
182Uses Schema datepublished   Other-0.141132 %43 %
183Has Copyright   Trust-0.141156 %70 %
184Uses JSON-LD Organization   Other-0.141128 %65 %
185Uses Schema imageobject   Other-0.141132 %46 %
186Uses JSON-LD BreadcrumbList   Other-0.141132 %63 %
187Variations in Search Result Summary   Relevancy-0.1364369 %64 %
188Uses Schema datemodified   Other-0.131130 %44 %
189Number of H4 Tags   Size-0.1322433 %76 %
190Uses Schema contenturl   Other-0.131121 %45 %
191Uses Schema description   Other-0.131142 %48 %
192Uses JSON-LD SearchAction   Other-0.131122 %56 %
193Uses Schema organization   Other-0.131133 %53 %
194Uses Schema inlanguage   Other-0.131128 %45 %
195Uses Schema webpage   Other-0.131130 %46 %
196Exact Matches in H1 Tags   Relevancy-0.132114 %79 %
197Number of HREF Lang Tags   Size-0.1326211 %73 %
198Uses Schema headline   Other-0.131119 %37 %
199Uses JSON-LD WebSite   Other-0.131127 %62 %
200Number of Questions In H3 Tags   Size-0.134114 %72 %