Measures 147614 SEO Factors

145892 Built-In SEO Factors

136733 On-page SEO Factors

9159 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 2025-12     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-0.23100231884 %82 %
2Number of Unique Variations Used   Diversity-0.2224679 %88 %
3Number of Distinct Entities Used   Diversity-0.22633079 %95 %
4Number of Top 200 Shared Factors Used   Diversity-0.22534097 %93 %
5Number of Top 100 Shared Factors Used   Diversity-0.22393097 %92 %
6Entities in Title Tag   Relevancy-0.227371 %94 %
7Number of Top 50 Shared Factors Used   Diversity-0.21171396 %92 %
8Search Result Domain is .com, .net, or .org   Other-0.21114 %62 %
9Variations in Div Tags   Relevancy-0.25222314774 %89 %
10Variations in Body Tags   Relevancy-0.213377234878 %88 %
11Variations in HTML Tags   Relevancy-0.213377234478 %90 %
12Entities in the HTML Tag   Relevancy-0.1977314175 %94 %
13Entities in Sentences   Relevancy-0.1963013872 %94 %
14Variations in H1-H6 Tags   Relevancy-0.19189764 %88 %
15Variations in H1, H2, and H3 Tags   Relevancy-0.19169663 %88 %
16Variations in H1 and H2 Tags   Relevancy-0.1978460 %87 %
17Variations in P Tags   Relevancy-0.1927543267 %90 %
18Search Result Domain is .com   Other-0.19114 %61 %
19Load Time Milliseconds   Performance-0.1923823139785 %88 %
20Variations in Search Result Document File Name   Relevancy-0.199145 %79 %
21Entities in H1 Tags-0.197258 %92 %
22Number of Factors Used   Diversity-0.1928117997 %88 %
23Variations in Sentences   Relevancy-0.18106104271 %89 %
24Term Frequency   Relevancy-0.185378 %90 %
25Variations in LI Tags   Relevancy-0.1828912265 %87 %
26Variations in A Tags   Relevancy-0.1854832565 %84 %
27Number of Referring Domains   Authority-0.18242511045 %70 %
28Variations in Search Result Display URL   Relevancy-0.1815275 %81 %
29Variations in Search Result Link Text   Relevancy-0.1815275 %81 %
30Entities in H2 Tags-0.1831753 %93 %
31Variations in H1 Tags   Relevancy-0.1812153 %87 %
32Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1818243 %86 %
33Variations in the Title Tag   Relevancy-0.1816264 %86 %
34Number of Backlinks   Authority-0.18770312697345 %71 %
35LSI Words in Sentences   Relevancy-0.18271373769 %94 %
36Leading Variations in H1-H6 Tags   Relevancy-0.1720246 %87 %
37Variations in Search Result URL Path   Relevancy-0.179146 %84 %
38Exact Matches in the HTML Tag   Relevancy-0.173491430 %86 %
39LSI Words in Title Tag   Relevancy-0.1714671 %94 %
40Number of Images   Size-0.171662978 %86 %
41Number of Do Follow Backlinks   Authority-0.17715834634741 %70 %
42Number of HTML Tags   Size-0.173192114485 %86 %
43Variations in Meta Description   Relevancy-0.1743252 %84 %
44Variation Count in Top 30KB   Relevancy-0.1759573067 %86 %
45Clean Keyword Density in the HTML Tag   Relevancy-0.17150470 %80 %
46Entities in Meta Description Tag   Relevancy-0.1711359 %89 %
47Variations in H2 Tags   Relevancy-0.1768344 %84 %
48Word Count   Size-0.174259138585 %85 %
49Variations in the Canonical URL   Relevancy-0.1748249 %85 %
50Number of No Follow Backlinks   Authority-0.165447875734 %66 %
51Unabridged Word Count   Size-0.166247175485 %87 %
52Number of Images with ALT Text   Size-0.161142073 %87 %
53Variations in A Tag HREF Attributes   Relevancy-0.1638014458 %87 %
54Clean Text Kilobytes   Size-0.161121277 %86 %
55Leading Variations in H1 Tags   Relevancy-0.162129 %81 %
56Number of P Tags   Size-0.161223777 %88 %
57Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182758 %88 %
58Variations in ALT Attributes   Relevancy-0.16410644 %84 %
59Variations in Span Tags   Relevancy-0.161081950 %87 %
60Entities in H3 Tags-0.1627644 %92 %
61Has Entities in H1 Tags   Relevancy-0.161159 %88 %
62TF/IDF   Relevancy-0.161156 %86 %
63Variations in Search Result URL   Relevancy-0.1622152 %80 %
64Variations in Nav Tags   Relevancy-0.16131853947 %84 %
65Variation Density in Top 30KB   Relevancy-0.16296360 %81 %
66Variations in First 100 Words   Relevancy-0.16152663 %83 %
67Number of Heading Tags   Size-0.16532178 %86 %
68Number of HTTPS Links   Authority-0.1659916082 %85 %
69LSI Words in H1 Tags   Relevancy-0.1614460 %92 %
70Number of DoFollow Links   Authority-0.1659515782 %85 %
71Number of Links   Authority-0.1659916182 %85 %
72Number of Internal Links   Authority-0.1659214781 %85 %
73Number of Forms   Technology-0.1614357 %80 %
74Uses Microdata WPAdBlock   Other-0.16111 %12 %
75Uses Schema wpadblock   Other-0.16111 %12 %
76Leading Variations in Title Tag   Relevancy-0.161132 %81 %
77Exact Matches in H1-H6 Tags   Relevancy-0.1511119 %84 %
78Variations in Main Tags   Relevancy-0.15254398137 %87 %
79Percentage of DoFollow Internal Links   Authority-0.15937681 %86 %
80Variations in Absolute URLs   Relevancy-0.1588476859 %87 %
81Variations in Script Tags   Relevancy-0.154881513762 %85 %
82Percentage of DoFollow Links   Authority-0.151008582 %90 %
83Title Tag Has Entities   Relevancy-0.151171 %88 %
84Variations in OpenGraph Title   Relevancy-0.1511152 %78 %
85Number of H1 Tags   Size-0.155272 %87 %
86Search Result Number of Dirs in Path   Other-0.154274 %75 %
87Variations in OpenGraph Description   Relevancy-0.1597247 %79 %
88Number of HTML Comments   Size-0.159814574 %85 %
89LSI Words in Meta Description Tag   Relevancy-0.15421158 %91 %
90Number of DoFollow External Links   Authority-0.15551277 %84 %
91Exact Matches in Top 30KB   Relevancy-0.1529218 %78 %
92Number of External Links   Authority-0.15731478 %85 %
93Number of H2 Tags   Size-0.1518768 %85 %
94Uses JSON-LD itemReviewed-0.14112 %11 %
95Exact Matches in Sentences   Relevancy-0.1442322 %85 %
96LSI Words in H2 Tags   Relevancy-0.14811957 %93 %
97Variations in H3 Tags   Relevancy-0.1496332 %83 %
98Exact Matches in Title Tag   Relevancy-0.142118 %83 %
99Variations in Footer Tags   Relevancy-0.1439751235 %82 %
100Variations making whole H1-H6 Tags   Relevancy-0.142117 %78 %
101Number of Sentences   Size-0.1462212383 %83 %
102Flesch Kincaid Reading Grade Level   Other-0.147292 %87 %
103Has Entities in H2 Tags   Relevancy-0.141154 %85 %
104Variations in TITLE Attributes   Relevancy-0.14345637 %82 %
105Leading Variations in H2 Tags   Relevancy-0.148121 %82 %
106Variations making whole H1, H2, and H3 Tags   Relevancy-0.141116 %78 %
107Has Privacy Policy   Trust-0.141158 %72 %
108Number of Images without ALT Text   Size-0.141061059 %80 %
109Number of H3 Tags   Size-0.1438860 %83 %
110Average Words Per Sentence   Size-0.141663280 %80 %
111Has Meta Charset   Technology-0.141177 %83 %
112Number of Includes   Technology-0.14492782 %74 %
113Has Form   Technology-0.141155 %77 %
114Variations in Section Tags   Relevancy-0.1315601736 %83 %
115Number of Facebook Pages   Authority-0.139261 %78 %
116Is Store Page   Other-0.131151 %70 %
117Meta Description Tag Has Entities   Relevancy-0.131158 %80 %
118Number Of JSON-LD Types   Relevancy-0.131461456 %77 %
119Number of Absolute URLs   Authority-0.13114928584 %78 %
120Entities in H4 Tags-0.1310222 %86 %
121Has JSON-LD Schema Markup   Relevancy-0.131154 %71 %
122Page Size Kilobytes   Size-0.1384830784 %76 %
123Number of Questions In Headings   Size-0.138235 %79 %
124Search Result Uses HTTPS   Other-0.131185 %84 %
125Variations Making Whole Span Tags   Relevancy-0.134120 %82 %
126Has Canonical URL   Authority-0.131172 %78 %
127Variations making whole H1 Tags   Relevancy-0.131111 %77 %
128Exact Matches in H1 Tags   Relevancy-0.132114 %82 %
129Has Meta Viewport   Technology-0.131183 %82 %
130Search Result Domain Length   Size-0.13261785 %78 %
131Search Result Host Length   Size-0.13261785 %78 %
132Variations in Strong Tags   Relevancy-0.1395225 %82 %
133Title Length   Size-0.13935084 %78 %
134Title Word Count   Size-0.1314883 %78 %
135Has Meta Description   Relevancy-0.131166 %78 %
136Number of Prices   Size-0.133876568 %81 %
137Number of CSS Includes   Technology-0.13201075 %74 %
138LSI Words in H3 Tags   Relevancy-0.13942050 %90 %
139Variations Making Whole LI Tags   Relevancy-0.136124 %76 %
140Number of Questions   Size-0.131001169 %80 %
141Has FavIcon   Technology-0.131177 %80 %
142Variations making whole A Tags   Relevancy-0.13111228 %73 %
143Is Purchase Page   Other-0.131144 %67 %
144Has Entities in H3 Tags   Relevancy-0.131145 %81 %
145Uses Schema name   Other-0.131161 %68 %
146Number of H4 Tags   Size-0.1316438 %79 %
147Meta Description Length   Size-0.1330912267 %78 %
148Uses Schema sku   Other-0.12117 %35 %
149Percentage of DoFollow External Links   Authority-0.12321175 %77 %
150Number of Questions In H2 Tags   Size-0.124122 %76 %
151Has Schema Markup   Relevancy-0.121165 %72 %
152Uses Schema image   Other-0.121122 %65 %
153Word Count in Meta Description   Size-0.12482067 %78 %
154Uses JSON-LD name   Other-0.121153 %70 %
155Number of JavaScript Includes   Technology-0.12381882 %74 %
156Has Contact Page   Trust-0.121163 %71 %
157Inline JavaScript Kilobytes   Size-0.1244710582 %75 %
158Is Home Page   Other-0.121120 %40 %
159Inline CSS Kilobytes   Size-0.122276065 %71 %
160Number of Instagram Pages   Authority-0.1216248 %76 %
161Headings Has Question   Other-0.121135 %74 %
162Uses Schema itemreviewed   Other-0.12113 %19 %
163Number of Social Accounts   Authority-0.1215242 %78 %
164Variations in I Tags   Relevancy-0.12299425 %78 %
165Uses Schema aggregaterating   Other-0.121110 %61 %
166Number of Social Pages   Authority-0.1217466 %78 %
167Variations in Button Tags   Relevancy-0.12427068 %80 %
168Number of Email Addresses   Trust-0.1272445 %80 %
169Exact Matches in H2 Tags   Relevancy-0.125111 %83 %
170Number of Facebook Accounts   Authority-0.128129 %76 %
171Number of HREF Lang Tags   Size-0.1244212 %74 %
172Has HREF Lang   Technology-0.121114 %69 %
173Variations in the last 100 words   Relevancy-0.12195345 %80 %
174Number of Nofollow Links   Authority-0.1223426 %76 %
175Uses JSON-LD sku   Other-0.12116 %38 %
176Uses JSON-LD image   Other-0.121117 %71 %
177Number of LinkedIn Pages   Authority-0.1214129 %72 %
178Has Meta Robots   Other-0.121127 %70 %
179Uses Schema pricecurrency   Other-0.12119 %50 %
180Uses Schema availability   Other-0.12117 %48 %
181Exact Matches in Meta Description   Relevancy-0.122112 %82 %
182Uses JSON-LD BreadcrumbList   Other-0.121135 %64 %
183Has OpenGraph Type   Relevancy-0.121161 %70 %
184Number of US Phone Numbers   Trust-0.116701236 %77 %
185Uses JSON-LD description   Other-0.111143 %64 %
186Search Result URL Length   Size-0.111056397 %57 %
187Uses Schema ratingvalue   Other-0.11119 %59 %
188Uses JSON-LD ListItem   Other-0.111136 %66 %
189Variations in Article Tags   Relevancy-0.116171122 %71 %
190Variations in Meta Twitter Content   Relevancy-0.114123 %66 %
191Search Result Summary Length   Size-0.1121715397 %64 %
192Variations in Meta Twitter Description   Relevancy-0.1130121 %71 %
193Has Terms of Service   Trust-0.111133 %61 %
194Uses Schema gtin13   Other-0.11113 %13 %
195Uses JSON-LD priceCurrency   Other-0.11118 %53 %
196LSI Words in H4 Tags   Relevancy-0.1165730 %84 %
197Uses Microdata sku   Other-0.11113 %12 %
198Uses Schema price   Other-0.11117 %46 %
199Variations in H4-H6 Tags   Relevancy-0.1132116 %76 %
200Uses Schema listitem   Other-0.111143 %63 %