Measures 154000 SEO Factors

152278 Built-In SEO Factors

143058 On-page SEO Factors

9220 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 2026-08     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-0.31106324673 %83 %
2Number of Referring Domains   Authority-0.287624732 %92 %
3Number of Backlinks   Authority-0.2733485101532 %92 %
4Has Meta Charset   Technology-0.271160 %91 %
5Number of Images   Size-0.27632359 %90 %
6Number of Heading Tags   Size-0.27471961 %94 %
7Number of Do Follow Backlinks   Authority-0.271438771628 %92 %
8Number of Top 50 Shared Factors Used   Diversity-0.27161285 %92 %
9Number of Images with ALT Text   Size-0.26481654 %90 %
10Number of H1 Tags   Size-0.262157 %95 %
11Number of No Follow Backlinks   Authority-0.261909931121 %89 %
12Number of P Tags   Size-0.26923460 %95 %
13Number of Top 200 Shared Factors Used   Diversity-0.26493886 %93 %
14Number of H2 Tags   Size-0.2514755 %97 %
15Clean Text Kilobytes   Size-0.25441159 %97 %
16Number of Top 100 Shared Factors Used   Diversity-0.25372886 %93 %
17Variations in Search Result Document File Name   Relevancy-0.253141 %83 %
18Variations in H1 and H2 Tags   Relevancy-0.2571650 %88 %
19Variations in H1-H6 Tags   Relevancy-0.241701152 %88 %
20Word Count   Size-0.243552127374 %97 %
21Variations in H1, H2, and H3 Tags   Relevancy-0.241431051 %88 %
22Variations in P Tags   Relevancy-0.2450588350 %95 %
23Has Entities in H2 Tags   Relevancy-0.241143 %90 %
24Unabridged Word Count   Size-0.244278155574 %98 %
25Number of External Links   Authority-0.24301163 %96 %
26Entities in H2 Tags-0.2432843 %97 %
27Average Words Per Sentence   Size-0.241033064 %90 %
28Search Result Domain is .com, .net, or .org   Other-0.24115 %78 %
29LSI Words in Sentences   Relevancy-0.24285860255 %98 %
30Number of DoFollow External Links   Authority-0.23301062 %97 %
31Variations in H1 Tags   Relevancy-0.235144 %83 %
32Entities in Sentences   Relevancy-0.2357213257 %98 %
33Search Result Domain is .com   Other-0.23115 %78 %
34Variations in Search Result URL Path   Relevancy-0.234243 %84 %
35Variations in Search Result URL   Relevancy-0.234250 %75 %
36Entities in H1 Tags-0.235242 %95 %
37Number of Links   Authority-0.2333111868 %95 %
38Leading Variations in H1, H2, and H3 Tags   Relevancy-0.236239 %83 %
39Number of HTTPS Links   Authority-0.2333111868 %95 %
40Has Entities in H1 Tags   Relevancy-0.221144 %95 %
41Variations in LI Tags   Relevancy-0.228573551 %87 %
42Number of DoFollow Links   Authority-0.2233111668 %96 %
43Leading Variations in H1-H6 Tags   Relevancy-0.228240 %86 %
44LSI Words in H2 Tags   Relevancy-0.22842044 %97 %
45Variation Count in Top 30KB   Relevancy-0.2249739755 %83 %
46Load Time Milliseconds   Performance-0.2221680201376 %83 %
47Number of HTML Comments   Size-0.224314457 %90 %
48Entities in the HTML Tag   Relevancy-0.2257713663 %98 %
49Number of Unique Variations Used   Diversity-0.22371473 %65 %
50Number of Internal Links   Authority-0.2232010767 %93 %
51Number of HTML Tags   Size-0.22279092475 %94 %
52Variations in A Tags   Relevancy-0.2226796652 %83 %
53Has JSON-LD Schema Markup   Relevancy-0.211144 %86 %
54Variations in Div Tags   Relevancy-0.212657352958 %90 %
55Variations in H2 Tags   Relevancy-0.2163541 %89 %
56Search Result URL Length   Size-0.21846184 %54 %
57Search Result Number of Dirs in Path   Other-0.213266 %77 %
58LSI Words in H1 Tags   Relevancy-0.2113445 %94 %
59Has US Phone Number   Trust-0.211130 %82 %
60Is Home Page   Other-0.211113 %58 %
61Number of H3 Tags   Size-0.2118845 %88 %
62Number of Factors Used   Diversity-0.2128818486 %88 %
63Variations in A Tag HREF Attributes   Relevancy-0.2110215648 %87 %
64Variations in ALT Attributes   Relevancy-0.213871037 %83 %
65Number of Images without ALT Text   Size-0.2124843 %92 %
66Variations in Distinct A Tag HREF Attributes   Relevancy-0.27263448 %88 %
67Variations in Main Tags   Relevancy-0.2857914530 %84 %
68Number of Forms   Technology-0.27239 %90 %
69Variations in Nav Tags   Relevancy-0.2585710437 %85 %
70Number of US Phone Numbers   Trust-0.245729 %83 %
71Number Of JSON-LD Types   Relevancy-0.2551545 %84 %
72Variations in the Canonical URL   Relevancy-0.24243 %83 %
73Flesch Kincaid Reading Grade Level   Other-0.26282 %87 %
74Number of Distinct Entities Used   Diversity-0.2582767 %91 %
75Number of Social Accounts   Authority-0.194127 %89 %
76Has Form   Technology-0.191138 %88 %
77Number of Facebook Pages   Authority-0.194242 %90 %
78Entities in H3 Tags-0.1931734 %95 %
79Uses JSON-LD url   Other-0.191142 %83 %
80Number of LinkedIn Pages   Authority-0.192120 %93 %
81Variations in Span Tags   Relevancy-0.195011741 %94 %
82Search Result Summary Length   Size-0.1915314683 %74 %
83Uses JSON-LD name   Other-0.191146 %83 %
84Percentage of DoFollow External Links   Authority-0.19281161 %90 %
85Number of Instagram Pages   Authority-0.1911333 %88 %
86LSI Words in H3 Tags   Relevancy-0.19841735 %91 %
87Has Privacy Policy   Trust-0.191146 %78 %
88Variations in Footer Tags   Relevancy-0.1828934632 %83 %
89Variations in Section Tags   Relevancy-0.1813353431 %90 %
90Variations in Body Tags   Relevancy-0.18107116187268 %85 %
91Number of Social Pages   Authority-0.1814551 %91 %
92Has Entities in H3 Tags   Relevancy-0.181134 %87 %
93Number Of Claimed Brands   Other-0.1821319 %84 %
94Variations in OpenGraph Title   Relevancy-0.1811251 %62 %
95Number of Includes   Technology-0.18432567 %81 %
96Entities in Title Tag   Relevancy-0.188358 %81 %
97Uses JSON-LD description   Other-0.181135 %80 %
98Percentage of DoFollow Links   Authority-0.18998169 %78 %
99Uses JSON-LD MedicalOrganization   Other-0.18115 %16 %
100Variations in HTML Tags   Relevancy-0.18107116178965 %90 %
101Variations in Search Result Display URL   Relevancy-0.179270 %70 %
102Variations in Search Result Link Text   Relevancy-0.179270 %70 %
103Number of Questions In Headings   Size-0.177229 %88 %
104Number of Sentences   Size-0.1757913472 %77 %
105Search Result Domain Length   Size-0.17231775 %80 %
106Search Result Host Length   Size-0.17231775 %80 %
107Variations in Absolute URLs   Relevancy-0.174326054 %89 %
108Uses Schema medicalorganization   Other-0.17115 %16 %
109Leading Variations in H2 Tags   Relevancy-0.173122 %83 %
110Has Meta Robots   Other-0.171119 %83 %
111Uses JSON-LD ListItem   Other-0.171130 %77 %
112Leading Variations in H1 Tags   Relevancy-0.171125 %84 %
113Number of Facebook Accounts   Authority-0.172116 %87 %
114Term Frequency   Relevancy-0.176366 %83 %
115Number of CSS Includes   Technology-0.1717959 %72 %
116Number of Twitter Accounts   Authority-0.171113 %88 %
117Has Meta Viewport   Technology-0.171171 %69 %
118Uses JSON-LD mainEntity   Other-0.17111 %14 %
119Variations in H3 Tags   Relevancy-0.1772430 %78 %
120Headings Has Question   Other-0.171128 %83 %
121Uses JSON-LD BreadcrumbList   Other-0.171129 %77 %
122Has Contact Page   Trust-0.171157 %58 %
123Variations in the Title Tag   Relevancy-0.1713256 %70 %
124Percentage of DoFollow Internal Links   Authority-0.17867167 %64 %
125Uses Schema organization   Other-0.171127 %84 %
126Variations in Sentences   Relevancy-0.1712615558 %90 %
127Variations in First 100 Words   Relevancy-0.17174959 %78 %
128Exact Matches in the HTML Tag   Relevancy-0.16152820 %83 %
129Variations in Meta Description   Relevancy-0.164250 %72 %
130Number of H4 Tags   Size-0.1621326 %87 %
131Is Article Page   Other-0.161136 %77 %
132Uses Schema description   Other-0.161144 %50 %
133Uses Schema website   Other-0.161130 %80 %
134Uses Schema name   Other-0.161153 %58 %
135Uses Schema webpage   Other-0.161128 %77 %
136Variations making whole H1-H6 Tags   Relevancy-0.161116 %79 %
137Variations Making Whole LI Tags   Relevancy-0.163123 %78 %
138Has Apple Touch Icon   Technology-0.161141 %79 %
139Uses Schema url   Other-0.161149 %58 %
140Search Result Uses HTTPS   Other-0.161175 %78 %
141Exact Matches in H1-H6 Tags   Relevancy-0.166113 %78 %
142Uses JSON-LD Organization   Other-0.161125 %85 %
143Is Pagination Page   Other-0.161115 %68 %
144Variations in Strong Tags   Relevancy-0.1695321 %89 %
145Inline CSS Kilobytes   Size-0.161816459 %87 %
146Has Meta Twitter Card   Authority-0.161149 %45 %
147Entities in Meta Description Tag   Relevancy-0.168451 %75 %
148Uses JSON-LD WebPage   Other-0.151126 %80 %
149Uses JSON-LD item   Other-0.151120 %69 %
150Uses Schema telephone   Other-0.151117 %72 %
151Uses JSON-LD MedicalProcedure   Other-0.15115 %14 %
152Uses Schema medicalprocedure   Other-0.15115 %14 %
153Uses JSON-LD datePublished   Other-0.151128 %78 %
154TF/IDF   Relevancy-0.151150 %80 %
155Uses JSON-LD dateModified   Other-0.151128 %75 %
156Has OpenGraph Type   Relevancy-0.151156 %51 %
157Uses JSON-LD articleBody   Other-0.15113 %19 %
158Number of Email Addresses   Trust-0.1511437 %79 %
159Has Schema Markup   Relevancy-0.151157 %55 %
160Uses Schema addressregion   Other-0.151115 %70 %
161Uses Schema datemodified   Other-0.151128 %74 %
162Uses Schema postalcode   Other-0.151117 %75 %
163Number of Meta Generator Tags   Technology-0.152128 %72 %
164Has OpenGraph Image   Relevancy-0.151149 %50 %
165Variations in OpenGraph Description   Relevancy-0.157247 %70 %
166Uses JSON-LD WebSite   Other-0.151127 %83 %
167Exact Matches in Top 30KB   Relevancy-0.1510113 %77 %
168Variations making whole H1, H2, and H3 Tags   Relevancy-0.151114 %81 %
169Variations Making Whole Span Tags   Relevancy-0.154118 %86 %
170LSI Words in Meta Description Tag   Relevancy-0.15241048 %77 %
171Is OpenGraph Type Article   Technology-0.151128 %61 %
172Uses JSON-LD addressRegion   Other-0.151115 %72 %
173Uses JSON-LD image   Other-0.151114 %73 %
174Number of Questions In H3 Tags   Size-0.154113 %77 %
175Number of Questions In H2 Tags   Size-0.154120 %85 %
176Variation Density in Top 30KB   Relevancy-0.15284957 %72 %
177Search Result Has Rewritten Page Title   Other-0.151146 %51 %
178Meta Description Length   Size-0.1521411959 %63 %
179Has Google Verify   Technology-0.141115 %82 %
180Variations in Button Tags   Relevancy-0.1424823810 %85 %
181Uses Schema addresslocality   Other-0.141117 %74 %
182Number of Absolute URLs   Authority-0.14105726674 %65 %
183Page Size Kilobytes   Size-0.1486429874 %50 %
184Leading Variations in Title Tag   Relevancy-0.141128 %81 %
185Uses Schema image   Other-0.141117 %73 %
186Title Tag Has Entities   Relevancy-0.141158 %68 %
187Uses Schema breadcrumblist   Other-0.141138 %49 %
188Uses Schema copyrightyear   Other-0.14112 %20 %
189Uses Schema postaladdress   Other-0.141117 %76 %
190Uses Schema listitem   Other-0.141138 %50 %
191Uses Schema hasmap   Other-0.14116 %40 %
192Variations making whole A Tags   Relevancy-0.1410226 %84 %
193Title Word Count   Size-0.1417875 %57 %
194Uses JSON-LD ImageObject-0.141125 %85 %
195Uses JSON-LD PostalAddress   Other-0.141116 %76 %
196Title Length   Size-0.141185475 %57 %
197Is Category Page   Other-0.141113 %72 %
198Variations in H4-H6 Tags   Relevancy-0.1411215 %74 %
199Uses JSON-LD postalCode   Other-0.141116 %78 %
200Variations in Script Tags   Relevancy-0.149658454 %79 %