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-0.29147697149033 %92 %
4Number of Do Follow Backlinks   Authority-0.28123617118730 %92 %
5Number of P Tags   Size-0.271813857 %91 %
6Number of Heading Tags   Size-0.27482058 %91 %
7Number of No Follow Backlinks   Authority-0.273538134722 %89 %
8Number of Images   Size-0.261062558 %93 %
9Clean Text Kilobytes   Size-0.26701257 %92 %
10Number of Top 200 Shared Factors Used   Diversity-0.26503485 %91 %
11Number of Images with ALT Text   Size-0.26701853 %91 %
12Has Meta Charset   Technology-0.261158 %92 %
13Search Result Domain is .com, .net, or .org   Other-0.25115 %81 %
14Number of H1 Tags   Size-0.254154 %92 %
15Unabridged Word Count   Size-0.258335168872 %92 %
16Load Time Milliseconds   Performance-0.2529355210573 %89 %
17Word Count   Size-0.257427137372 %92 %
18Number of H2 Tags   Size-0.2515752 %90 %
19Search Result Domain is .com   Other-0.25115 %81 %
20Number of Top 100 Shared Factors Used   Diversity-0.25382685 %91 %
21Number of Top 50 Shared Factors Used   Diversity-0.25161084 %90 %
22Average Words Per Sentence   Size-0.242322962 %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-0.23280192373 %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 %
30LSI Words in Sentences   Relevancy-0.23482956950 %94 %
31Number of Facebook Pages   Authority-0.2318242 %88 %
32Variations in P Tags   Relevancy-0.2350584745 %90 %
33Number of DoFollow External Links   Authority-0.23481161 %93 %
34Variations in H1, H2, and H3 Tags   Relevancy-0.22254744 %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-0.228876755 %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-0.212657324854 %88 %
48Entities in Sentences   Relevancy-0.2158910948 %96 %
49Number of Factors Used   Diversity-0.2131916985 %86 %
50Variation Count in Top 30KB   Relevancy-0.249733847 %83 %
51Variations in H1 Tags   Relevancy-0.212138 %85 %
52Entities in H2 Tags-0.232637 %93 %
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 %
58LSI Words in H1 Tags   Relevancy-0.213340 %91 %
59Number Of JSON-LD Types   Relevancy-0.21481544 %86 %
60Entities in the HTML Tag   Relevancy-0.259211253 %95 %
61Number of Instagram Pages   Authority-0.215234 %89 %
62Variations in H2 Tags   Relevancy-0.282435 %84 %
63Number of Social Accounts   Authority-0.199229 %89 %
64Number of Social Pages   Authority-0.1931549 %89 %
65Has US Phone Number   Trust-0.191129 %81 %
66Uses JSON-LD name   Other-0.191143 %82 %
67Number of CSS Includes   Technology-0.1925959 %78 %
68Entities in H1 Tags-0.196237 %90 %
69Variations in Main Tags   Relevancy-0.191164410627 %85 %
70Number of US Phone Numbers   Trust-0.1911551229 %85 %
71Has Entities in H2 Tags   Relevancy-0.191137 %89 %
72Number of Facebook Accounts   Authority-0.198119 %85 %
73Flesch Kincaid Reading Grade Level   Other-0.196181 %87 %
74Search Result Domain Length   Size-0.19241671 %78 %
75Search Result Host Length   Size-0.19241671 %78 %
76Uses JSON-LD url-0.191138 %79 %
77Is Home Page   Other-0.191112 %57 %
78Variations in Search Result URL Path   Relevancy-0.198134 %87 %
79Has Entities in H1 Tags   Relevancy-0.191138 %91 %
80Variations in Body Tags   Relevancy-0.1910711656560 %83 %
81Number of Questions In Headings   Size-0.189229 %86 %
82Variations in HTML Tags   Relevancy-0.1810711655059 %86 %
83LSI Words in H3 Tags   Relevancy-0.181111734 %91 %
84Variations in Span Tags   Relevancy-0.185171235 %90 %
85Variations in Search Result URL   Relevancy-0.1817141 %83 %
86Headings Has Question   Other-0.181129 %82 %
87Number of Distinct Entities Used   Diversity-0.18822357 %91 %
88Entities in H3 Tags-0.1831630 %93 %
89Percentage of DoFollow External Links   Authority-0.18291260 %84 %
90Variations in ALT Attributes   Relevancy-0.18387731 %84 %
91Variations in Nav Tags   Relevancy-0.1767335233 %81 %
92Term Frequency   Relevancy-0.176358 %80 %
93Variations in Sentences   Relevancy-0.1724565153 %85 %
94Number of H4 Tags   Size-0.1721326 %86 %
95Uses JSON-LD description   Other-0.171132 %78 %
96Variations in Search Result Link Text   Relevancy-0.179261 %77 %
97Has Apple Touch Icon   Technology-0.171138 %80 %
98Variations in Search Result Display URL   Relevancy-0.179261 %77 %
99Leading Variations in H1 Tags   Relevancy-0.172120 %82 %
100Has Meta Robots   Other-0.171120 %83 %
101Number of Twitter Accounts   Authority-0.172113 %86 %
102Variations in Section Tags   Relevancy-0.1713352227 %89 %
103Variations in H3 Tags   Relevancy-0.17163426 %83 %
104Search Result Summary Length   Size-0.1715514684 %75 %
105Search Result URL Length   Size-0.17876284 %58 %
106Uses Schema organization   Other-0.171126 %80 %
107Number of Sentences   Size-0.1786014470 %81 %
108Is Article Page   Other-0.171132 %76 %
109Percentage of DoFollow Links   Authority-0.17997967 %76 %
110Number of JavaScript Includes   Technology-0.17611768 %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-0.1615244139 %90 %
115Uses JSON-LD BreadcrumbList   Other-0.161127 %76 %
116Uses Schema website   Other-0.161126 %71 %
117Variations in Distinct A Tag HREF Attributes   Relevancy-0.168872539 %90 %
118Search Result Uses HTTPS   Other-0.161172 %81 %
119Has Privacy Policy   Trust-0.161147 %69 %
120Uses JSON-LD ListItem   Other-0.161128 %76 %
121Has Entities in H3 Tags   Relevancy-0.161130 %87 %
122Uses JSON-LD datePublished   Other-0.161124 %73 %
123Has Contact Page   Trust-0.161150 %61 %
124Number Of Claimed Brands   Other-0.1628219 %84 %
125Page Size Kilobytes   Size-0.1686430471 %51 %
126Has Email   Trust-0.161135 %74 %
127Uses Schema datemodified   Other-0.161124 %69 %
128Number of Absolute URLs   Authority-0.16105725171 %64 %
129Inline CSS Kilobytes   Size-0.162745756 %84 %
130Number of Email Addresses   Trust-0.1628436 %81 %
131Number of Questions In H2 Tags   Size-0.164118 %83 %
132Variations in the Canonical URL   Relevancy-0.1644234 %85 %
133Exact Matches in the HTML Tag   Relevancy-0.16162821 %82 %
134Uses JSON-LD WebSite-0.161124 %75 %
135Number of Meta Generator Tags   Technology-0.162125 %70 %
136Uses Schema webpage   Other-0.161124 %72 %
137Number of Questions In H3 Tags   Size-0.155115 %80 %
138Variations in OpenGraph Title   Relevancy-0.1511241 %65 %
139Variations in Meta Description   Relevancy-0.1541242 %74 %
140Uses JSON-LD dateModified   Other-0.151123 %71 %
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 WebPage   Other-0.151123 %74 %
145Uses JSON-LD ImageObject   Other-0.151123 %76 %
146Number of HREF Lang Tags   Size-0.1529210 %83 %
147Is OpenGraph Type Article   Technology-0.151123 %64 %
148Is Store Page   Other-0.151136 %66 %
149Leading Variations in H2 Tags   Relevancy-0.154117 %82 %
150Uses Schema name   Other-0.151149 %56 %
151Inline JavaScript Kilobytes   Size-0.1572012367 %44 %
152Number of Questions   Size-0.151091357 %63 %
153Has Google Verify   Technology-0.151114 %80 %
154Uses JSON-LD SearchAction   Other-0.151117 %73 %
155Number of Nofollow Links   Authority-0.1541316 %82 %
156Has HREF Lang   Technology-0.151110 %80 %
157Exact Matches in Top 30KB   Relevancy-0.1517213 %80 %
158Uses Schema searchaction   Other-0.151117 %72 %
159Exact Matches in H1-H6 Tags   Relevancy-0.149114 %84 %
160Variations making whole H1-H6 Tags   Relevancy-0.143111 %82 %
161Variations in Absolute URLs   Relevancy-0.1441255343 %90 %
162Variations in OpenGraph Description   Relevancy-0.1438238 %71 %
163Variations in Footer Tags   Relevancy-0.1448262927 %83 %
164Uses JSON-LD mainEntity   Other-0.14111 %11 %
165Uses Schema image   Other-0.141115 %75 %
166Has Schema Markup   Relevancy-0.141153 %55 %
167Variations in Script Tags   Relevancy-0.14129859848 %75 %
168Is Pagination Page   Other-0.141115 %68 %
169Number of H5 Tags   Size-0.1426211 %84 %
170Uses JSON-LD inLanguage   Other-0.141123 %69 %
171Has Canonical URL   Authority-0.141160 %59 %
172Uses Schema inlanguage   Other-0.141123 %68 %
173Variations in First 100 Words   Relevancy-0.14186745 %81 %
174LSI Words in Meta Description Tag   Relevancy-0.1430945 %85 %
175Entities in Meta Description Tag   Relevancy-0.149342 %80 %
176LSI Words in H4 Tags   Relevancy-0.1452519 %87 %
177Has Terms of Service   Trust-0.141129 %58 %
178Uses Schema telephone   Other-0.141115 %71 %
179Variations in Strong Tags   Relevancy-0.1496319 %85 %
180Variations making whole H1, H2, and H3 Tags   Relevancy-0.142110 %82 %
181Uses Schema breadcrumblist   Other-0.141134 %43 %
182Title Word Count   Size-0.1423870 %59 %
183Word Count in Meta Description   Size-0.14631958 %62 %
184Number of Prices   Size-0.14104410258 %75 %
185Uses Schema url   Other-0.141145 %53 %
186Uses Schema listitem   Other-0.141135 %43 %
187Uses JSON-LD image   Other-0.141112 %77 %
188Number of NoFollow External Links   Authority-0.1433211 %81 %
189Percentage of NoFollow Links   Authority-0.146214 %80 %
190Uses JSON-LD item-0.141119 %72 %
191Title Length   Size-0.131685370 %60 %
192Meta Description Length   Size-0.1335411658 %65 %
193Uses Schema description   Other-0.131139 %47 %
194Variation Density in Top 30KB   Relevancy-0.13322545 %67 %
195Variations in Search Result Summary   Relevancy-0.1343359 %64 %
196Uses Schema aggregaterating   Other-0.13118 %65 %
197Clean Keyword Density in the HTML Tag   Relevancy-0.13192550 %65 %
198Has FavIcon   Technology-0.131162 %60 %
199Has Meta Twitter Card   Authority-0.131145 %43 %
200LSI Words in Title Tag   Relevancy-0.1316552 %79 %