Measures 150356 SEO Factors

148634 Built-In SEO Factors

139432 On-page SEO Factors

9202 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 2026-04     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-0.2389730179 %86 %
2Number of Unique Variations Used   Diversity-0.2320674 %89 %
3Number of Top 50 Shared Factors Used   Diversity-0.22161292 %92 %
4Load Time Milliseconds   Performance-0.2214022150581 %91 %
5Number of Top 200 Shared Factors Used   Diversity-0.22503794 %94 %
6Number of Top 100 Shared Factors Used   Diversity-0.22372894 %94 %
7Search Result Domain is .com, .net, or .org   Other-0.21116 %78 %
8Variations in Search Result Display URL   Relevancy-0.213274 %81 %
9Variations in Search Result Link Text   Relevancy-0.213274 %81 %
10Search Result Domain is .com   Other-0.2115 %77 %
11Variations in H1, H2, and H3 Tags   Relevancy-0.217554 %89 %
12Variations in H1 and H2 Tags   Relevancy-0.210352 %90 %
13Variations in H1-H6 Tags   Relevancy-0.228655 %89 %
14Number of Distinct Entities Used   Diversity-0.2602873 %95 %
15Entities in Title Tag   Relevancy-0.27360 %93 %
16Variations in Body Tags   Relevancy-0.2111318571 %89 %
17Variations in HTML Tags   Relevancy-0.2111318471 %89 %
18LSI Words in Sentences   Relevancy-0.19303382064 %94 %
19Number of Factors Used   Diversity-0.1926616794 %93 %
20Variations in P Tags   Relevancy-0.192002657 %93 %
21Entities in Sentences   Relevancy-0.1944914262 %96 %
22Variations in Search Result Document File Name   Relevancy-0.193139 %86 %
23Variations in Div Tags   Relevancy-0.194739467 %92 %
24Entities in the HTML Tag   Relevancy-0.1945114667 %96 %
25Leading Variations in H1-H6 Tags   Relevancy-0.197236 %87 %
26Variations in H1 Tags   Relevancy-0.193147 %86 %
27Term Frequency   Relevancy-0.194371 %88 %
28Entities in H2 Tags-0.1827745 %94 %
29Entities in H1 Tags-0.185247 %91 %
30Variation Count in Top 30KB   Relevancy-0.18811857 %86 %
31Variations in the Title Tag   Relevancy-0.183159 %85 %
32LSI Words in H1 Tags   Relevancy-0.1814555 %92 %
33Variations in Sentences   Relevancy-0.181723063 %90 %
34Leading Variations in H1, H2, and H3 Tags   Relevancy-0.187134 %89 %
35LSI Words in Title Tag   Relevancy-0.1814669 %90 %
36Word Count   Size-0.184223147780 %89 %
37Unabridged Word Count   Size-0.188545221780 %89 %
38Variations in LI Tags   Relevancy-0.18761756 %92 %
39Variations in Meta Description   Relevancy-0.184247 %81 %
40Variations in Search Result URL Path   Relevancy-0.183141 %85 %
41Number of Includes   Technology-0.17492475 %75 %
42Variations in A Tags   Relevancy-0.17761855 %91 %
43Number of HTML Tags   Size-0.17271399780 %83 %
44Clean Text Kilobytes   Size-0.17491566 %87 %
45Variations in H2 Tags   Relevancy-0.179337 %89 %
46Number of Images with ALT Text   Size-0.17772062 %85 %
47Variations in ALT Attributes   Relevancy-0.1753639 %83 %
48Entities in H3 Tags-0.1728637 %95 %
49Leading Variations in Title Tag   Relevancy-0.171126 %79 %
50Variations in the Canonical URL   Relevancy-0.176141 %88 %
51Variations in OpenGraph Title   Relevancy-0.172149 %78 %
52Variations in Span Tags   Relevancy-0.1724843 %86 %
53TF/IDF   Relevancy-0.171150 %86 %
54LSI Words in H2 Tags   Relevancy-0.17962253 %93 %
55Number of P Tags   Size-0.16983765 %87 %
56Clean Keyword Density in the HTML Tag   Relevancy-0.168363 %83 %
57Number of Images   Size-0.161032767 %87 %
58Variation Density in Top 30KB   Relevancy-0.167253 %84 %
59Variations in Search Result URL   Relevancy-0.163148 %82 %
60Number of Facebook Pages   Authority-0.166250 %83 %
61Number of Heading Tags   Size-0.16532066 %85 %
62Has JSON-LD Schema Markup   Relevancy-0.161146 %83 %
63Leading Variations in H1 Tags   Relevancy-0.161122 %86 %
64Search Result Number of Dirs in Path   Other-0.163273 %77 %
65Exact Matches in the HTML Tag   Relevancy-0.164321327 %84 %
66Variations in OpenGraph Description   Relevancy-0.163143 %81 %
67Variations in Absolute URLs   Relevancy-0.162084550 %90 %
68Variations in Main Tags   Relevancy-0.162735234 %87 %
69Variations in A Tag HREF Attributes   Relevancy-0.161573349 %90 %
70Number of CSS Includes   Technology-0.1617868 %78 %
71Number of H2 Tags   Size-0.1616760 %89 %
72Number of HTTPS Links   Authority-0.1660013973 %88 %
73Number of H1 Tags   Size-0.162162 %91 %
74Number of Links   Authority-0.1660114073 %88 %
75Variations in Distinct A Tag HREF Attributes   Relevancy-0.161162149 %90 %
76Has Entities in H1 Tags   Relevancy-0.161147 %88 %
77Number of Questions In Headings   Size-0.1610231 %80 %
78Variations in Script Tags   Relevancy-0.164775256 %79 %
79Entities in Meta Description Tag   Relevancy-0.168351 %87 %
80Flesch Kincaid Reading Grade Level   Other-0.166191 %87 %
81Number of DoFollow Links   Authority-0.1659213773 %88 %
82Number of Internal Links   Authority-0.1659512672 %88 %
83Variations in Nav Tags   Relevancy-0.161682038 %85 %
84LSI Words in Meta Description Tag   Relevancy-0.15301156 %88 %
85Number of Referring Domains   Authority-0.1530409844 %76 %
86Variations in Section Tags   Relevancy-0.15551533 %86 %
87Number of Backlinks   Authority-0.1519454221993045 %78 %
88Variations in First 100 Words   Relevancy-0.1517558 %89 %
89Average Words Per Sentence   Size-0.151493271 %82 %
90Search Result Domain Length   Size-0.15221680 %82 %
91Search Result Host Length   Size-0.15221680 %82 %
92Number of No Follow Backlinks   Authority-0.15328486206934 %68 %
93Number of Do Follow Backlinks   Authority-0.1519453741860041 %76 %
94Search Result Uses HTTPS   Other-0.151179 %82 %
95Has Entities in H2 Tags   Relevancy-0.151146 %90 %
96Number of Sentences   Size-0.1566013377 %81 %
97Number of Forms   Technology-0.159247 %74 %
98Variations in H3 Tags   Relevancy-0.1511228 %85 %
99Leading Variations in H2 Tags   Relevancy-0.154117 %84 %
100Percentage of DoFollow Internal Links   Authority-0.15916872 %86 %
101Number of H3 Tags   Size-0.1528851 %82 %
102Percentage of DoFollow Links   Authority-0.15987973 %87 %
103Number Of JSON-LD Types   Relevancy-0.152291649 %87 %
104Number of Absolute URLs   Authority-0.1492726278 %76 %
105Headings Has Question   Other-0.141130 %79 %
106Exact Matches in Sentences   Relevancy-0.1437421 %85 %
107Number of DoFollow External Links   Authority-0.14291369 %82 %
108Has Meta Charset   Technology-0.141166 %81 %
109Number of External Links   Authority-0.14311469 %84 %
110LSI Words in H3 Tags   Relevancy-0.141062144 %89 %
111Title Tag Has Entities   Relevancy-0.141160 %85 %
112Number of HTML Comments   Size-0.142334062 %85 %
113Has Canonical URL   Authority-0.141165 %76 %
114Number of JavaScript Includes   Technology-0.14401776 %70 %
115Number of Images without ALT Text   Size-0.1437851 %84 %
116Number of H4 Tags   Size-0.1427431 %78 %
117Uses Schema name   Other-0.141155 %67 %
118Has Privacy Policy   Trust-0.141153 %78 %
119Uses JSON-LD name   Other-0.141146 %80 %
120Entities in H4 Tags-0.1414217 %90 %
121Title Length   Size-0.141075278 %72 %
122Has Meta Viewport   Technology-0.141177 %76 %
123Has Form   Technology-0.141147 %74 %
124Variations in Strong Tags   Relevancy-0.1410222 %81 %
125Has Schema Markup   Relevancy-0.141159 %72 %
126Number of Facebook Accounts   Authority-0.143124 %76 %
127Meta Description Length   Size-0.1420711962 %73 %
128Title Word Count   Size-0.1418877 %74 %
129Variations making whole H1-H6 Tags   Relevancy-0.141112 %78 %
130Number of Questions In H2 Tags   Size-0.134121 %81 %
131Word Count in Meta Description   Size-0.13391961 %72 %
132Variations in Footer Tags   Relevancy-0.1362629 %85 %
133Search Result URL Length   Size-0.13946494 %57 %
134Variations Making Whole LI Tags   Relevancy-0.134118 %80 %
135Number of Social Pages   Authority-0.1320457 %76 %
136Number of LinkedIn Pages   Authority-0.132128 %81 %
137Has US Phone Number   Trust-0.131137 %73 %
138Page Size Kilobytes   Size-0.13103733279 %65 %
139Number of US Phone Numbers   Trust-0.13116937 %83 %
140Inline CSS Kilobytes   Size-0.132075362 %84 %
141Variations Making Whole Span Tags   Relevancy-0.139115 %83 %
142Uses JSON-LD description   Other-0.131139 %71 %
143Number of Nofollow Links   Authority-0.1318422 %80 %
144Variations in I Tags   Relevancy-0.1314319 %81 %
145Has Meta Twitter Card   Authority-0.131149 %60 %
146Exact Matches in H1-H6 Tags   Relevancy-0.1313118 %85 %
147Uses JSON-LD url   Other-0.131140 %77 %
148Has Contact Page   Trust-0.131157 %74 %
149Percentage of NoFollow Links   Authority-0.1315220 %76 %
150Exact Matches in Title Tag   Relevancy-0.132115 %80 %
151Number of Instagram Pages   Authority-0.1317238 %73 %
152Has OpenGraph Type   Relevancy-0.131156 %67 %
153Has Entities in H3 Tags   Relevancy-0.131138 %84 %
154Has Meta Robots   Other-0.131122 %74 %
155Variations making whole H1, H2, and H3 Tags   Relevancy-0.131110 %80 %
156Number of Questions   Size-0.13651261 %74 %
157Uses Schema url   Other-0.131151 %66 %
158Uses JSON-LD datePublished   Other-0.131129 %64 %
159Exact Matches in Top 30KB   Relevancy-0.1312215 %80 %
160Uses Microdata FAQPage   Other-0.13114 %22 %
161Number of Social Accounts   Authority-0.137238 %84 %
162Uses JSON-LD ImageObject   Other-0.131129 %63 %
163Uses Microdata acceptedAnswer   Other-0.12114 %26 %
164Uses Schema acceptedanswer   Other-0.12114 %26 %
165Variations making whole A Tags   Relevancy-0.124123 %81 %
166Uses Schema product   Other-0.12119 %41 %
167LSI Words in H4 Tags   Relevancy-0.1253726 %83 %
168Is Article Page   Other-0.121139 %68 %
169Search Result Summary Length   Size-0.1216315294 %71 %
170Uses Schema website   Other-0.121128 %61 %
171Is Home Page   Other-0.121113 %38 %
172Number Of Claimed Brands   Other-0.1215221 %75 %
173Has Meta Description   Relevancy-0.121161 %73 %
174Has FavIcon   Technology-0.121169 %66 %
175Number of Email Addresses   Trust-0.1258437 %78 %
176Uses Microdata Answer   Other-0.12114 %27 %
177Number of HREF Lang Tags   Size-0.1257312 %72 %
178Uses Microdata mainEntity   Other-0.12114 %27 %
179Percentage of DoFollow External Links   Authority-0.12241268 %81 %
180Uses JSON-LD ListItem   Other-0.121131 %76 %
181Meta Description Tag Has Entities   Relevancy-0.121151 %79 %
182Uses Microdata Question   Other-0.12114 %27 %
183Uses Schema datemodified   Other-0.121127 %59 %
184Uses JSON-LD Product   Other-0.12118 %44 %
185Is OpenGraph Type Article   Technology-0.121129 %65 %
186Percentage of NoFollow Internal Links   Authority-0.126112 %74 %
187Variations in B Tags   Relevancy-0.1219210 %74 %
188Uses JSON-LD dateModified   Other-0.121126 %63 %
189Uses Schema listitem   Other-0.121138 %66 %
190Number of Prices   Size-0.1236410363 %78 %
191Is Pagination Page   Other-0.121116 %66 %
192Variations in Meta Twitter Description   Relevancy-0.122121 %70 %
193Number of Questions In H3 Tags   Size-0.127115 %78 %
194Variations in Meta Twitter Content   Relevancy-0.122123 %65 %
195Uses JSON-LD BreadcrumbList   Other-0.121130 %75 %
196Uses Schema description   Other-0.121144 %65 %
197Uses Schema pricespecification   Other-0.12111 %12 %
198Has OpenGraph Image   Relevancy-0.121152 %67 %
199Uses Schema faqpage   Other-0.121110 %54 %
200Uses Schema breadcrumblist   Other-0.121137 %65 %