Measures 154032 SEO Factors

152310 Built-In SEO Factors

143086 On-page SEO Factors

9224 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-0.31106322670 %84 %
2Number of Referring Domains   Authority-0.297624231 %92 %
3Has Meta Charset   Technology-0.281158 %92 %
4Number of Backlinks   Authority-0.28147697202131 %92 %
5Number of Heading Tags   Size-0.28471958 %94 %
6Number of P Tags   Size-0.271283757 %92 %
7Number of Do Follow Backlinks   Authority-0.27123617157728 %92 %
8Number of Images   Size-0.27792357 %91 %
9Number of Top 200 Shared Factors Used   Diversity-0.27493683 %93 %
10Number of H1 Tags   Size-0.273154 %95 %
11Number of Images with ALT Text   Size-0.27621552 %90 %
12Number of Top 50 Shared Factors Used   Diversity-0.26161183 %90 %
13Number of H2 Tags   Size-0.2615752 %93 %
14Number of No Follow Backlinks   Authority-0.263072558221 %90 %
15Clean Text Kilobytes   Size-0.26701157 %95 %
16Number of Top 100 Shared Factors Used   Diversity-0.26372783 %93 %
17Word Count   Size-0.257427135473 %95 %
18Variations in H1-H6 Tags   Relevancy-0.25170947 %86 %
19Unabridged Word Count   Size-0.258335165773 %96 %
20Variations in H1 and H2 Tags   Relevancy-0.2571545 %87 %
21Variations in H1, H2, and H3 Tags   Relevancy-0.25143846 %87 %
22Variations in P Tags   Relevancy-0.2550585747 %89 %
23LSI Words in Sentences   Relevancy-0.24482961154 %97 %
24Variations in H1 Tags   Relevancy-0.245139 %84 %
25Variations in Search Result Document File Name   Relevancy-0.244136 %88 %
26Search Result Domain is .com, .net, or .org   Other-0.24115 %83 %
27Average Words Per Sentence   Size-0.241343162 %92 %
28Has JSON-LD Schema Markup   Relevancy-0.231141 %86 %
29Number of Unique Variations Used   Diversity-0.23431371 %59 %
30Search Result Domain is .com   Other-0.23115 %83 %
31Number of External Links   Authority-0.23441162 %95 %
32Number of DoFollow Links   Authority-0.2333111366 %93 %
33Number of Links   Authority-0.2333111566 %93 %
34Number of HTML Comments   Size-0.234314755 %92 %
35LSI Words in H2 Tags   Relevancy-0.23841842 %95 %
36Number of DoFollow External Links   Authority-0.23441060 %95 %
37Number of HTTPS Links   Authority-0.2333111466 %93 %
38Variation Count in Top 30KB   Relevancy-0.2349735750 %82 %
39Variations in LI Tags   Relevancy-0.238572846 %86 %
40Load Time Milliseconds   Performance-0.2321680210873 %87 %
41Entities in Sentences   Relevancy-0.2358912052 %98 %
42Leading Variations in H1-H6 Tags   Relevancy-0.238236 %84 %
43Leading Variations in H1, H2, and H3 Tags   Relevancy-0.226235 %84 %
44Number of H3 Tags   Size-0.2225843 %89 %
45Variations in Search Result URL Path   Relevancy-0.225138 %86 %
46Number of Images without ALT Text   Size-0.2244841 %92 %
47Number of Internal Links   Authority-0.2232010465 %92 %
48Entities in H2 Tags-0.2232738 %97 %
49Entities in H1 Tags-0.226238 %94 %
50Variations in Search Result URL   Relevancy-0.225244 %80 %
51Entities in the HTML Tag   Relevancy-0.2159212457 %97 %
52Number of HTML Tags   Size-0.21279092473 %92 %
53Variations in H2 Tags   Relevancy-0.2163436 %84 %
54Variations in Div Tags   Relevancy-0.212657330856 %87 %
55Has Entities in H1 Tags   Relevancy-0.211140 %96 %
56Number of Factors Used   Diversity-0.2131917683 %87 %
57Has Entities in H2 Tags   Relevancy-0.211139 %93 %
58LSI Words in H1 Tags   Relevancy-0.2113443 %95 %
59Number of Forms   Technology-0.217236 %89 %
60Variations in A Tags   Relevancy-0.2126794246 %83 %
61Number of Facebook Pages   Authority-0.219241 %90 %
62Number Of JSON-LD Types   Relevancy-0.211481544 %88 %
63Has US Phone Number   Trust-0.211129 %83 %
64Search Result Number of Dirs in Path   Other-0.23265 %80 %
65Number of LinkedIn Pages   Authority-0.23120 %93 %
66Has Form   Technology-0.21135 %88 %
67Uses JSON-LD name   Other-0.21143 %84 %
68LSI Words in H3 Tags   Relevancy-0.2951835 %92 %
69Is Home Page   Other-0.21113 %60 %
70Variations in Main Tags   Relevancy-0.2857910028 %84 %
71Uses JSON-LD url   Other-0.21139 %84 %
72Search Result Summary Length   Size-0.215314681 %78 %
73Number of Social Accounts   Authority-0.24228 %88 %
74Number of US Phone Numbers   Trust-0.211551629 %85 %
75Variations in ALT Attributes   Relevancy-0.19387833 %81 %
76Search Result URL Length   Size-0.19876282 %57 %
77Flesch Kincaid Reading Grade Level   Other-0.196179 %85 %
78Variations in Body Tags   Relevancy-0.19107116102464 %80 %
79Variations in Span Tags   Relevancy-0.195011337 %92 %
80Number of Includes   Technology-0.19632465 %84 %
81Variations in Nav Tags   Relevancy-0.1958576334 %81 %
82Leading Variations in H1 Tags   Relevancy-0.191123 %82 %
83Number of CSS Includes   Technology-0.1921957 %77 %
84Variations in Search Result Display URL   Relevancy-0.199263 %75 %
85Variations in Search Result Link Text   Relevancy-0.199263 %75 %
86Number of Questions In Headings   Size-0.197228 %89 %
87Entities in H3 Tags-0.1931630 %96 %
88Has Privacy Policy   Trust-0.191146 %72 %
89Number of Instagram Pages   Authority-0.1912231 %88 %
90Variations in the Canonical URL   Relevancy-0.195237 %84 %
91Percentage of DoFollow External Links   Authority-0.19281160 %85 %
92Number of Distinct Entities Used   Diversity-0.19822460 %92 %
93Uses JSON-LD description   Other-0.191132 %82 %
94Variations in H3 Tags   Relevancy-0.1872427 %81 %
95Variations in HTML Tags   Relevancy-0.1810711698161 %84 %
96Variations in A Tag HREF Attributes   Relevancy-0.1810214742 %90 %
97Number of Social Pages   Authority-0.1821449 %91 %
98Uses JSON-LD ListItem   Other-0.181128 %78 %
99Headings Has Question   Other-0.181128 %85 %
100Uses JSON-LD BreadcrumbList   Other-0.181128 %76 %
101Variations in Distinct A Tag HREF Attributes   Relevancy-0.187262943 %90 %
102Percentage of DoFollow Links   Authority-0.18998167 %74 %
103Search Result Domain Length   Size-0.18231772 %80 %
104Search Result Host Length   Size-0.18231772 %80 %
105Variations in Section Tags   Relevancy-0.1813352528 %91 %
106Has Apple Touch Icon   Technology-0.181138 %82 %
107Is Article Page   Other-0.181132 %80 %
108Uses Schema website   Other-0.181127 %78 %
109Number of Facebook Accounts   Authority-0.182117 %86 %
110Has Contact Page   Trust-0.181151 %58 %
111Exact Matches in the HTML Tag   Relevancy-0.18152821 %78 %
112Has Entities in H3 Tags   Relevancy-0.181131 %91 %
113Variations in the Title Tag   Relevancy-0.1813250 %76 %
114Variations in Sentences   Relevancy-0.1712614955 %85 %
115Variations in OpenGraph Title   Relevancy-0.1711244 %66 %
116Term Frequency   Relevancy-0.176361 %81 %
117Number of H4 Tags   Size-0.1721325 %89 %
118Number of Twitter Accounts   Authority-0.172113 %86 %
119Has Meta Robots   Other-0.171118 %85 %
120Number of Meta Generator Tags   Technology-0.172126 %71 %
121Uses JSON-LD WebSite-0.171124 %80 %
122Exact Matches in H1-H6 Tags   Relevancy-0.179114 %84 %
123Variations in First 100 Words   Relevancy-0.17174751 %80 %
124Uses JSON-LD datePublished   Other-0.171124 %78 %
125Uses Schema organization   Other-0.171125 %84 %
126Percentage of DoFollow Internal Links   Authority-0.17877066 %69 %
127Leading Variations in H2 Tags   Relevancy-0.173119 %82 %
128Number of Sentences   Size-0.1761914371 %77 %
129Number Of Claimed Brands   Other-0.1721218 %85 %
130Uses Schema webpage   Other-0.161124 %77 %
131Entities in Title Tag   Relevancy-0.168351 %84 %
132Number of Questions In H2 Tags   Size-0.164118 %86 %
133Uses JSON-LD Organization   Other-0.161124 %84 %
134Variations in Absolute URLs   Relevancy-0.164325447 %90 %
135Variations making whole H1-H6 Tags   Relevancy-0.162113 %78 %
136Uses JSON-LD dateModified   Other-0.161124 %76 %
137Variations in Footer Tags   Relevancy-0.1628932428 %86 %
138Exact Matches in Top 30KB   Relevancy-0.1611213 %81 %
139Uses JSON-LD WebPage   Other-0.161123 %80 %
140Variations in Meta Description   Relevancy-0.164244 %73 %
141Uses Schema datemodified   Other-0.161124 %75 %
142Inline CSS Kilobytes   Size-0.161816357 %86 %
143Is OpenGraph Type Article   Technology-0.161124 %66 %
144Uses Schema name   Other-0.161150 %58 %
145Leading Variations in Title Tag   Relevancy-0.161126 %83 %
146Number of Questions In H3 Tags   Size-0.165114 %82 %
147Uses JSON-LD SearchAction   Other-0.161118 %77 %
148Search Result Uses HTTPS   Other-0.161172 %80 %
149Uses Schema searchaction   Other-0.161118 %75 %
150Uses Schema breadcrumblist   Other-0.161135 %46 %
151Variations making whole H1, H2, and H3 Tags   Relevancy-0.151112 %80 %
152Variations in OpenGraph Description   Relevancy-0.157240 %70 %
153Uses Schema listitem   Other-0.151136 %46 %
154Uses JSON-LD item   Other-0.151119 %73 %
155Uses JSON-LD inLanguage   Other-0.151124 %74 %
156Uses JSON-LD ImageObject   Other-0.151123 %83 %
157Uses Schema inlanguage   Other-0.151124 %72 %
158Number of Absolute URLs   Authority-0.15105725173 %58 %
159Number of Email Addresses   Trust-0.1523535 %80 %
160Has Meta Viewport   Technology-0.151169 %70 %
161Clean Keyword Density in the HTML Tag   Relevancy-0.15175555 %63 %
162Variations in Strong Tags   Relevancy-0.1595319 %86 %
163Uses Schema telephone   Other-0.151115 %71 %
164Has Google Verify   Technology-0.151114 %79 %
165Uses JSON-LD MedicalOrganization   Other-0.15115 %11 %
166LSI Words in H4 Tags   Relevancy-0.1552519 %88 %
167Uses JSON-LD mainEntity   Other-0.15111 %14 %
168Uses Schema image   Other-0.151115 %75 %
169Uses Schema description   Other-0.151140 %52 %
170Has RSS Link   Authority-0.151120 %66 %
171Has Schema Markup   Relevancy-0.151154 %53 %
172Uses Schema url   Other-0.151146 %60 %
173Uses Schema medicalorganization   Other-0.15115 %11 %
174LSI Words in Meta Description Tag   Relevancy-0.15241047 %81 %
175Variation Density in Top 30KB   Relevancy-0.15284550 %70 %
176Page Size Kilobytes   Size-0.1586429773 %45 %
177Uses JSON-LD image   Other-0.151113 %76 %
178Entities in Meta Description Tag   Relevancy-0.158344 %80 %
179Variations in Search Result Summary   Relevancy-0.1543364 %61 %
180TF/IDF   Relevancy-0.151144 %80 %
181Has Email   Trust-0.141135 %74 %
182Variations in Button Tags   Relevancy-0.1424821810 %83 %
183Uses Schema postalcode   Other-0.141114 %73 %
184Number of Questions   Size-0.14531360 %58 %
185Word Count in Meta Description   Size-0.14631958 %57 %
186Number of JavaScript Includes   Technology-0.14611767 %82 %
187Variations in Script Tags   Relevancy-0.149658251 %73 %
188Title Word Count   Size-0.1422872 %54 %
189Has OpenGraph Image   Relevancy-0.141148 %47 %
190Uses Schema addresslocality   Other-0.141115 %70 %
191Uses Schema addressregion   Other-0.141114 %69 %
192Uses JSON-LD addressRegion   Other-0.141113 %70 %
193Inline JavaScript Kilobytes   Size-0.1449511768 %38 %
194Uses JSON-LD EntryPoint   Other-0.141116 %77 %
195Has Terms of Service   Trust-0.141129 %59 %
196Uses JSON-LD postalCode   Other-0.141114 %76 %
197Uses Schema streetaddress   Other-0.141114 %73 %
198Variations making whole A Tags   Relevancy-0.1410122 %85 %
199Is Pagination Page   Other-0.141114 %67 %
200Variations Making Whole LI Tags   Relevancy-0.143119 %82 %