Measures 154120 SEO Factors

152398 Built-In SEO Factors

143173 On-page SEO Factors

9225 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-0.3106322570 %81 %
2Number of Referring Domains   Authority-0.37903433 %91 %
3Number of Backlinks   Authority-0.29147697147133 %92 %
4Number of Do Follow Backlinks   Authority-0.28123617118530 %92 %
5Number of P Tags   Size-0.271813857 %91 %
6Number of Heading Tags   Size-0.27482058 %91 %
7Number of No Follow Backlinks   Authority-0.273538133022 %89 %
8Number of Images   Size-0.261062558 %93 %
9Clean Text Kilobytes   Size-0.26701257 %93 %
10Number of Top 200 Shared Factors Used   Diversity-0.26503485 %92 %
11Number of Images with ALT Text   Size-0.26701853 %91 %
12Has Meta Charset   Technology-0.261158 %92 %
13Number of H1 Tags   Size-0.254154 %92 %
14Search Result Domain is .com, .net, or .org   Other-0.25115 %81 %
15Unabridged Word Count   Size-0.258335169472 %93 %
16Load Time Milliseconds   Performance-0.2529355210973 %89 %
17Number of H2 Tags   Size-0.2515752 %91 %
18Word Count   Size-0.257427137872 %93 %
19Number of Top 100 Shared Factors Used   Diversity-0.25382685 %91 %
20Search Result Domain is .com   Other-0.25115 %81 %
21Number of Top 50 Shared Factors Used   Diversity-0.25161084 %90 %
22Average Words Per Sentence   Size-0.232322962 %89 %
23Number of Links   Authority-0.2350511267 %91 %
24Number of DoFollow Links   Authority-0.2350211067 %92 %
25Number of HTTPS Links   Authority-0.2350511166 %92 %
26Number of HTML Tags   Size-0.23280192673 %91 %
27Number of External Links   Authority-0.23701262 %93 %
28Number of Internal Links   Authority-0.2349410165 %90 %
29Variations in H1-H6 Tags   Relevancy-0.23304845 %86 %
30Number of DoFollow External Links   Authority-0.23481161 %93 %
31LSI Words in Sentences   Relevancy-0.23482956950 %94 %
32Variations in P Tags   Relevancy-0.2350584745 %90 %
33Number of Facebook Pages   Authority-0.2318242 %88 %
34Variations in H1, H2, and H3 Tags   Relevancy-0.22254745 %87 %
35Variations in H1 and H2 Tags   Relevancy-0.2291443 %86 %
36Has JSON-LD Schema Markup   Relevancy-0.221141 %84 %
37Number of HTML Comments   Size-0.228876855 %91 %
38Number of Images without ALT Text   Size-0.2244842 %93 %
39Number of H3 Tags   Size-0.2227845 %88 %
40Search Result Number of Dirs in Path   Other-0.223265 %82 %
41Number of Unique Variations Used   Diversity-0.21441163 %70 %
42Number of Forms   Technology-0.217236 %88 %
43Variations in LI Tags   Relevancy-0.219532544 %86 %
44Number of Includes   Technology-0.21632466 %82 %
45LSI Words in H2 Tags   Relevancy-0.21841640 %93 %
46Has Form   Technology-0.211135 %85 %
47Variations in Div Tags   Relevancy-0.212657325054 %88 %
48Entities in Sentences   Relevancy-0.258911048 %96 %
49Number of Factors Used   Diversity-0.231917085 %86 %
50Variations in H1 Tags   Relevancy-0.212138 %86 %
51Entities in H2 Tags-0.232637 %93 %
52Variation Count in Top 30KB   Relevancy-0.249733847 %83 %
53Leading Variations in H1-H6 Tags   Relevancy-0.214233 %85 %
54Variations in Search Result Document File Name   Relevancy-0.28134 %86 %
55Leading Variations in H1, H2, and H3 Tags   Relevancy-0.210232 %85 %
56Number of LinkedIn Pages   Authority-0.24120 %91 %
57Variations in A Tags   Relevancy-0.232643844 %82 %
58Number Of JSON-LD Types   Relevancy-0.21481544 %86 %
59LSI Words in H1 Tags   Relevancy-0.213340 %91 %
60Number of Instagram Pages   Authority-0.215234 %89 %
61Entities in the HTML Tag   Relevancy-0.259211253 %95 %
62Variations in H2 Tags   Relevancy-0.282435 %84 %
63Has US Phone Number   Trust-0.191129 %81 %
64Number of CSS Includes   Technology-0.1925959 %78 %
65Number of Social Accounts   Authority-0.199229 %89 %
66Uses JSON-LD name   Other-0.191143 %82 %
67Number of Social Pages   Authority-0.1931549 %89 %
68Variations in Main Tags   Relevancy-0.191164410727 %85 %
69Number of US Phone Numbers   Trust-0.1911551329 %85 %
70Entities in H1 Tags-0.196237 %90 %
71Has Entities in H2 Tags   Relevancy-0.191137 %89 %
72Number of Facebook Accounts   Authority-0.198119 %86 %
73Flesch Kincaid Reading Grade Level   Other-0.196181 %87 %
74Search Result Domain Length   Size-0.19241671 %79 %
75Search Result Host Length   Size-0.19241671 %78 %
76Is Home Page   Other-0.191112 %58 %
77Uses JSON-LD url-0.191138 %79 %
78Variations in Body Tags   Relevancy-0.1910711657060 %83 %
79Variations in Search Result URL Path   Relevancy-0.198135 %87 %
80Number of Questions In Headings   Size-0.189229 %86 %
81Has Entities in H1 Tags   Relevancy-0.181138 %91 %
82Variations in HTML Tags   Relevancy-0.1810711655558 %86 %
83LSI Words in H3 Tags   Relevancy-0.181111734 %91 %
84Variations in Span Tags   Relevancy-0.185171235 %90 %
85Headings Has Question   Other-0.181129 %82 %
86Number of Distinct Entities Used   Diversity-0.18822357 %91 %
87Percentage of DoFollow External Links   Authority-0.18281160 %84 %
88Variations in Search Result URL   Relevancy-0.1817141 %83 %
89Variations in ALT Attributes   Relevancy-0.18387731 %84 %
90Entities in H3 Tags-0.1731630 %93 %
91Term Frequency   Relevancy-0.176358 %80 %
92Variations in Nav Tags   Relevancy-0.1767335333 %81 %
93Variations in Sentences   Relevancy-0.1724565253 %85 %
94Number of H4 Tags   Size-0.1721326 %86 %
95Variations in Search Result Link Text   Relevancy-0.179261 %77 %
96Uses JSON-LD description   Other-0.171132 %78 %
97Variations in Search Result Display URL   Relevancy-0.179261 %77 %
98Has Apple Touch Icon   Technology-0.171138 %80 %
99Has Meta Robots   Other-0.171120 %82 %
100Leading Variations in H1 Tags   Relevancy-0.172120 %82 %
101Number of Twitter Accounts   Authority-0.172113 %86 %
102Variations in Section Tags   Relevancy-0.1713352227 %89 %
103Search Result URL Length   Size-0.17876284 %58 %
104Variations in H3 Tags   Relevancy-0.17163426 %83 %
105Number of Sentences   Size-0.1786014570 %81 %
106Search Result Summary Length   Size-0.1715514684 %75 %
107Uses Schema organization   Other-0.171126 %80 %
108Percentage of DoFollow Links   Authority-0.17998067 %76 %
109Is Article Page   Other-0.171132 %76 %
110Number of JavaScript Includes   Technology-0.16611768 %80 %
111Uses JSON-LD Organization   Other-0.161124 %81 %
112Percentage of DoFollow Internal Links   Authority-0.16886865 %71 %
113Variations in the Title Tag   Relevancy-0.1613246 %74 %
114Variations in A Tag HREF Attributes   Relevancy-0.1615244140 %90 %
115Uses JSON-LD BreadcrumbList   Other-0.161127 %75 %
116Uses Schema website   Other-0.161126 %71 %
117Has Privacy Policy   Trust-0.161147 %69 %
118Uses JSON-LD ListItem   Other-0.161128 %76 %
119Search Result Uses HTTPS   Other-0.161172 %82 %
120Variations in Distinct A Tag HREF Attributes   Relevancy-0.168872539 %90 %
121Has Entities in H3 Tags   Relevancy-0.161130 %87 %
122Has Contact Page   Trust-0.161150 %61 %
123Uses JSON-LD datePublished   Other-0.161124 %73 %
124Number Of Claimed Brands   Other-0.1628219 %84 %
125Page Size Kilobytes   Size-0.1686430371 %51 %
126Number of Absolute URLs   Authority-0.16105725171 %64 %
127Uses Schema datemodified   Other-0.161124 %68 %
128Inline CSS Kilobytes   Size-0.162745756 %84 %
129Has Email   Trust-0.161135 %74 %
130Number of Questions In H2 Tags   Size-0.164118 %83 %
131Number of Email Addresses   Trust-0.1628436 %81 %
132Number of Meta Generator Tags   Technology-0.162125 %70 %
133Uses JSON-LD WebSite-0.151124 %74 %
134Number of Questions In H3 Tags   Size-0.155115 %80 %
135Variations in the Canonical URL   Relevancy-0.1544234 %85 %
136Uses Schema webpage   Other-0.151124 %72 %
137Exact Matches in the HTML Tag   Relevancy-0.15162821 %82 %
138Variations in OpenGraph Title   Relevancy-0.1511241 %65 %
139Uses JSON-LD dateModified   Other-0.151123 %71 %
140Variations in Meta Description   Relevancy-0.1541242 %74 %
141Leading Variations in Title Tag   Relevancy-0.151124 %80 %
142Entities in Title Tag   Relevancy-0.158248 %84 %
143Has Meta Viewport   Technology-0.151169 %75 %
144Uses JSON-LD ImageObject   Other-0.151123 %76 %
145Uses JSON-LD WebPage   Other-0.151123 %74 %
146Number of HREF Lang Tags   Size-0.1529210 %83 %
147Leading Variations in H2 Tags   Relevancy-0.154117 %82 %
148Is OpenGraph Type Article   Technology-0.151123 %64 %
149Is Store Page   Other-0.151136 %66 %
150Number of Questions   Size-0.151091357 %63 %
151Inline JavaScript Kilobytes   Size-0.1565912167 %44 %
152Uses JSON-LD SearchAction   Other-0.151117 %73 %
153Has Google Verify   Technology-0.151114 %80 %
154Uses Schema name   Other-0.151149 %56 %
155Has HREF Lang   Technology-0.151110 %80 %
156Number of Nofollow Links   Authority-0.1541316 %82 %
157Uses Schema searchaction   Other-0.151117 %71 %
158Exact Matches in Top 30KB   Relevancy-0.1417213 %80 %
159Variations making whole H1-H6 Tags   Relevancy-0.143111 %82 %
160Exact Matches in H1-H6 Tags   Relevancy-0.149114 %84 %
161Variations in Absolute URLs   Relevancy-0.1441255343 %90 %
162Variations in OpenGraph Description   Relevancy-0.1438238 %71 %
163Uses JSON-LD mainEntity   Other-0.14111 %11 %
164Variations in Footer Tags   Relevancy-0.1448262927 %83 %
165Uses Schema image   Other-0.141115 %75 %
166Has Schema Markup   Relevancy-0.141153 %55 %
167Variations in Script Tags   Relevancy-0.14129859948 %74 %
168Number of H5 Tags   Size-0.1426211 %84 %
169Uses JSON-LD inLanguage   Other-0.141123 %69 %
170Is Pagination Page   Other-0.141115 %68 %
171Has Canonical URL   Authority-0.141160 %60 %
172Uses Schema inlanguage   Other-0.141123 %68 %
173Has Terms of Service   Trust-0.141129 %59 %
174Uses Schema telephone   Other-0.141115 %72 %
175LSI Words in Meta Description Tag   Relevancy-0.1430945 %85 %
176LSI Words in H4 Tags   Relevancy-0.1452519 %87 %
177Entities in Meta Description Tag   Relevancy-0.149342 %80 %
178Variations making whole H1, H2, and H3 Tags   Relevancy-0.142110 %82 %
179Variations in First 100 Words   Relevancy-0.14186745 %81 %
180Title Word Count   Size-0.1423870 %59 %
181Word Count in Meta Description   Size-0.14631958 %62 %
182Variations in Strong Tags   Relevancy-0.1496319 %85 %
183Uses Schema breadcrumblist   Other-0.141134 %43 %
184Number of Prices   Size-0.14104410258 %75 %
185Uses JSON-LD image   Other-0.141112 %77 %
186Uses Schema listitem   Other-0.141135 %43 %
187Uses Schema url   Other-0.141145 %53 %
188Number of NoFollow External Links   Authority-0.1433211 %81 %
189Uses JSON-LD item-0.141119 %72 %
190Percentage of NoFollow Links   Authority-0.146214 %80 %
191Title Length   Size-0.131685370 %60 %
192Meta Description Length   Size-0.1335411658 %65 %
193Variations in Search Result Summary   Relevancy-0.1343359 %64 %
194Uses Schema aggregaterating   Other-0.13118 %65 %
195Uses Schema postalcode   Other-0.131113 %71 %
196Has Meta Twitter Card   Authority-0.131145 %44 %
197Uses Schema description   Other-0.131139 %47 %
198Variation Density in Top 30KB   Relevancy-0.13322545 %67 %
199Has Meta Description   Relevancy-0.131157 %57 %
200Uses JSON-LD telePhone   Other-0.131112 %76 %