Measures 154013 SEO Factors

152291 Built-In SEO Factors

143068 On-page SEO Factors

9223 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-0.31106322872 %82 %
2Number of Referring Domains   Authority-0.297624231 %92 %
3Number of Backlinks   Authority-0.283348591531 %92 %
4Has Meta Charset   Technology-0.281158 %92 %
5Number of Images   Size-0.28632357 %89 %
6Number of Do Follow Backlinks   Authority-0.271438763727 %92 %
7Number of Images with ALT Text   Size-0.27481552 %88 %
8Number of Heading Tags   Size-0.27471959 %93 %
9Number of H1 Tags   Size-0.273154 %94 %
10Number of P Tags   Size-0.27923358 %92 %
11Number of No Follow Backlinks   Authority-0.271909928920 %88 %
12Number of Top 200 Shared Factors Used   Diversity-0.26493684 %93 %
13Clean Text Kilobytes   Size-0.26441157 %95 %
14Number of Top 50 Shared Factors Used   Diversity-0.26161184 %90 %
15Number of H2 Tags   Size-0.2614753 %93 %
16Number of Top 100 Shared Factors Used   Diversity-0.25372784 %94 %
17Word Count   Size-0.254922125374 %94 %
18Unabridged Word Count   Size-0.255857154874 %96 %
19Variations in H1 and H2 Tags   Relevancy-0.2571545 %85 %
20Variations in H1-H6 Tags   Relevancy-0.24170947 %84 %
21Variations in P Tags   Relevancy-0.2450586446 %89 %
22Search Result Domain is .com, .net, or .org   Other-0.24115 %83 %
23LSI Words in Sentences   Relevancy-0.24285858055 %97 %
24Variations in H1 Tags   Relevancy-0.245139 %83 %
25Variations in H1, H2, and H3 Tags   Relevancy-0.24143846 %87 %
26Number of External Links   Authority-0.23441162 %95 %
27Average Words Per Sentence   Size-0.231033162 %92 %
28Number of DoFollow External Links   Authority-0.23441060 %95 %
29Variations in Search Result Document File Name   Relevancy-0.233136 %86 %
30Search Result Domain is .com   Other-0.23115 %83 %
31Has JSON-LD Schema Markup   Relevancy-0.231141 %85 %
32Variation Count in Top 30KB   Relevancy-0.2349737049 %82 %
33Load Time Milliseconds   Performance-0.2321680208974 %84 %
34Number of Links   Authority-0.2333111767 %93 %
35Leading Variations in H1-H6 Tags   Relevancy-0.238235 %84 %
36Number of HTTPS Links   Authority-0.2233111667 %93 %
37Entities in Sentences   Relevancy-0.2257211652 %98 %
38Leading Variations in H1, H2, and H3 Tags   Relevancy-0.226234 %84 %
39LSI Words in H2 Tags   Relevancy-0.22841843 %94 %
40Number of DoFollow Links   Authority-0.2233111567 %94 %
41Variations in LI Tags   Relevancy-0.228573046 %85 %
42Number of HTML Comments   Size-0.224314856 %91 %
43Entities in H2 Tags-0.2232738 %97 %
44Number of Unique Variations Used   Diversity-0.22431372 %60 %
45Number of Internal Links   Authority-0.2232010665 %92 %
46Has Entities in H2 Tags   Relevancy-0.221138 %93 %
47Has Entities in H1 Tags   Relevancy-0.211139 %96 %
48Number of Images without ALT Text   Size-0.2144841 %93 %
49Entities in H1 Tags-0.215236 %94 %
50Variations in Search Result URL Path   Relevancy-0.214138 %85 %
51Number of H3 Tags   Size-0.2125843 %88 %
52Number of HTML Tags   Size-0.21279091574 %92 %
53Entities in the HTML Tag   Relevancy-0.2157712058 %98 %
54Number of Forms   Technology-0.217236 %91 %
55Has US Phone Number   Trust-0.211131 %83 %
56Variations in H2 Tags   Relevancy-0.2163436 %82 %
57Variations in Div Tags   Relevancy-0.212657338655 %87 %
58LSI Words in H1 Tags   Relevancy-0.2113444 %95 %
59Has Form   Technology-0.211136 %89 %
60Variations in A Tags   Relevancy-0.2126794946 %84 %
61Number of Factors Used   Diversity-0.2128817584 %87 %
62Search Result Number of Dirs in Path   Other-0.23265 %78 %
63Variations in Search Result URL   Relevancy-0.24244 %79 %
64Number of Facebook Pages   Authority-0.24241 %90 %
65Is Home Page   Other-0.21112 %63 %
66Number of US Phone Numbers   Trust-0.211551631 %86 %
67Uses JSON-LD url   Other-0.21139 %86 %
68Number Of JSON-LD Types   Relevancy-0.2551544 %87 %
69Number of LinkedIn Pages   Authority-0.23120 %93 %
70Variations in ALT Attributes   Relevancy-0.2387933 %79 %
71Uses JSON-LD name   Other-0.21144 %84 %
72Search Result Summary Length   Size-0.215314682 %77 %
73Variations in Main Tags   Relevancy-0.2857911127 %83 %
74Flesch Kincaid Reading Grade Level   Other-0.26180 %84 %
75Variations in Nav Tags   Relevancy-0.1958577834 %79 %
76Number of Social Accounts   Authority-0.194227 %86 %
77Search Result URL Length   Size-0.19876282 %56 %
78LSI Words in H3 Tags   Relevancy-0.19951735 %91 %
79Leading Variations in H1 Tags   Relevancy-0.191122 %83 %
80Has Privacy Policy   Trust-0.191146 %70 %
81Variations in Span Tags   Relevancy-0.195011436 %92 %
82Number of Instagram Pages   Authority-0.1911331 %86 %
83Variations in A Tag HREF Attributes   Relevancy-0.1910214842 %87 %
84Variations in Body Tags   Relevancy-0.19107116136964 %79 %
85Uses JSON-LD description   Other-0.191132 %83 %
86Percentage of DoFollow External Links   Authority-0.19281160 %87 %
87Entities in H3 Tags-0.1831630 %96 %
88Variations in Section Tags   Relevancy-0.1813352727 %92 %
89Number of Social Pages   Authority-0.1815549 %92 %
90Variations in Distinct A Tag HREF Attributes   Relevancy-0.187263042 %88 %
91Variations in Search Result Display URL   Relevancy-0.189263 %73 %
92Variations in Search Result Link Text   Relevancy-0.189263 %73 %
93Percentage of DoFollow Links   Authority-0.18998167 %74 %
94Number of Includes   Technology-0.18472566 %83 %
95Number of CSS Includes   Technology-0.1821957 %75 %
96Search Result Domain Length   Size-0.18231773 %81 %
97Search Result Host Length   Size-0.18231773 %81 %
98Is Article Page   Other-0.181133 %81 %
99Uses JSON-LD ListItem   Other-0.181129 %78 %
100Variations in the Canonical URL   Relevancy-0.184237 %83 %
101Number of Distinct Entities Used   Diversity-0.18822461 %91 %
102Uses JSON-LD BreadcrumbList   Other-0.181128 %77 %
103Variations in H3 Tags   Relevancy-0.1872426 %80 %
104Uses Schema website   Other-0.181128 %80 %
105Number Of Claimed Brands   Other-0.1821218 %84 %
106Variations in OpenGraph Title   Relevancy-0.1811244 %63 %
107Variations in HTML Tags   Relevancy-0.18107116128760 %84 %
108Has Meta Robots   Other-0.181118 %84 %
109Has Contact Page   Trust-0.171153 %55 %
110Number of Questions In Headings   Size-0.177227 %88 %
111Number of H4 Tags   Size-0.1721325 %88 %
112Has Apple Touch Icon   Technology-0.171138 %80 %
113Has Entities in H3 Tags   Relevancy-0.171130 %90 %
114Uses Schema organization   Other-0.171125 %86 %
115Headings Has Question   Other-0.171127 %84 %
116Variations in Footer Tags   Relevancy-0.1728933227 %84 %
117Number of Sentences   Size-0.1761913571 %73 %
118Number of Facebook Accounts   Authority-0.172116 %87 %
119Variations in the Title Tag   Relevancy-0.1713249 %74 %
120Uses JSON-LD WebSite   Other-0.171125 %83 %
121Uses Schema webpage   Other-0.171125 %79 %
122Uses JSON-LD datePublished   Other-0.171125 %81 %
123Exact Matches in the HTML Tag   Relevancy-0.17152820 %78 %
124Leading Variations in H2 Tags   Relevancy-0.173119 %81 %
125Term Frequency   Relevancy-0.176360 %80 %
126Uses JSON-LD Organization   Other-0.171124 %86 %
127Number of Twitter Accounts   Authority-0.162113 %87 %
128Percentage of DoFollow Internal Links   Authority-0.16877066 %66 %
129Variations in Sentences   Relevancy-0.1612615054 %87 %
130Uses JSON-LD WebPage   Other-0.161124 %81 %
131Number of Meta Generator Tags   Technology-0.162126 %74 %
132Uses JSON-LD mainEntity   Other-0.16111 %14 %
133Uses Schema name   Other-0.161151 %57 %
134Uses JSON-LD dateModified   Other-0.161124 %79 %
135Entities in Title Tag   Relevancy-0.168351 %83 %
136Variations in First 100 Words   Relevancy-0.16174751 %79 %
137Variations making whole H1-H6 Tags   Relevancy-0.162113 %78 %
138Variations in Absolute URLs   Relevancy-0.164325547 %89 %
139Uses Schema description   Other-0.161141 %50 %
140Uses Schema datemodified   Other-0.161124 %78 %
141Uses Schema url   Other-0.161146 %59 %
142Uses Schema telephone   Other-0.161116 %72 %
143Number of Email Addresses   Trust-0.1623535 %79 %
144Uses JSON-LD item   Other-0.161119 %74 %
145Is OpenGraph Type Article   Technology-0.161125 %67 %
146Has Google Verify   Technology-0.151114 %81 %
147Inline CSS Kilobytes   Size-0.151816458 %85 %
148Exact Matches in H1-H6 Tags   Relevancy-0.156113 %81 %
149Number of Questions In H2 Tags   Size-0.154117 %86 %
150Uses JSON-LD image   Other-0.151113 %75 %
151Has Meta Viewport   Technology-0.151170 %67 %
152Variations in Meta Description   Relevancy-0.154244 %71 %
153Uses JSON-LD SearchAction   Other-0.151118 %82 %
154Exact Matches in Top 30KB   Relevancy-0.1511112 %79 %
155Uses Schema image   Other-0.151116 %75 %
156Uses Schema searchaction   Other-0.151118 %81 %
157Variations making whole H1, H2, and H3 Tags   Relevancy-0.151112 %80 %
158Variations in Strong Tags   Relevancy-0.1595318 %89 %
159Number of Absolute URLs   Authority-0.15105726673 %58 %
160Variations in OpenGraph Description   Relevancy-0.157241 %68 %
161Has OpenGraph Image   Relevancy-0.151147 %46 %
162Uses JSON-LD ImageObject   Other-0.151123 %87 %
163Has Meta Twitter Card   Authority-0.151147 %42 %
164Uses Schema medicalprocedure   Other-0.15114 %13 %
165Uses Schema addressregion   Other-0.151114 %68 %
166Leading Variations in Title Tag   Relevancy-0.151124 %83 %
167Uses Schema breadcrumblist   Other-0.151135 %47 %
168Uses Schema postalcode   Other-0.151115 %75 %
169Has Schema Markup   Relevancy-0.151155 %52 %
170LSI Words in H4 Tags   Relevancy-0.1552519 %87 %
171Uses JSON-LD MedicalProcedure   Other-0.15114 %13 %
172Uses JSON-LD addressRegion   Other-0.151114 %69 %
173Number of Questions In H3 Tags   Size-0.154112 %79 %
174Uses Schema listitem   Other-0.151136 %48 %
175Uses JSON-LD MedicalOrganization   Other-0.15115 %13 %
176Is Pagination Page   Other-0.151115 %65 %
177Search Result Uses HTTPS   Other-0.151173 %79 %
178Title Word Count   Size-0.1517873 %53 %
179Variations Making Whole LI Tags   Relevancy-0.153119 %79 %
180Page Size Kilobytes   Size-0.1586430273 %42 %
181Uses Schema medicalorganization   Other-0.15115 %13 %
182Uses Schema addresslocality   Other-0.141115 %72 %
183Uses JSON-LD inLanguage   Other-0.141124 %77 %
184Uses JSON-LD telePhone   Other-0.141112 %79 %
185Variations in Script Tags   Relevancy-0.149658349 %72 %
186Has OpenGraph Type   Relevancy-0.141154 %49 %
187Uses Schema inlanguage   Other-0.141124 %76 %
188Has Email   Trust-0.141135 %73 %
189Uses Schema streetaddress   Other-0.141114 %76 %
190Uses Schema postaladdress   Other-0.141116 %74 %
191Title Length   Size-0.141185473 %54 %
192Uses JSON-LD postalCode   Other-0.141114 %78 %
193Has Terms of Service   Trust-0.141128 %58 %
194Uses JSON-LD PostalAddress   Other-0.141114 %74 %
195Word Count in Meta Description   Size-0.14631957 %55 %
196Number of HREF Lang Tags   Size-0.141029 %85 %
197Meta Description Length   Size-0.1435411957 %58 %
198Has HREF Lang   Technology-0.141110 %78 %
199Clean Keyword Density in the HTML Tag   Relevancy-0.14175655 %62 %
200Uses JSON-LD addressLocality   Other-0.141115 %74 %