Measures 147480 SEO Factors

145758 Built-In SEO Factors

136602 On-page SEO Factors

9156 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-0.24100233185 %83 %
2Number of Unique Variations Used   Diversity-0.2224679 %89 %
3Number of Top 200 Shared Factors Used   Diversity-0.22534097 %95 %
4Number of Top 100 Shared Factors Used   Diversity-0.22393096 %93 %
5Entities in Title Tag   Relevancy-0.227371 %94 %
6Number of Distinct Entities Used   Diversity-0.22633079 %95 %
7Search Result Domain is .com, .net, or .org   Other-0.21115 %57 %
8Number of Top 50 Shared Factors Used   Diversity-0.21161396 %94 %
9Variations in Div Tags   Relevancy-0.25222317274 %89 %
10Variations in Search Result Document File Name   Relevancy-0.29146 %77 %
11Variations in H1-H6 Tags   Relevancy-0.2189663 %90 %
12Search Result Domain is .com   Other-0.2114 %57 %
13Variations in Body Tags   Relevancy-0.213377242378 %89 %
14Variations in HTML Tags   Relevancy-0.213377242177 %89 %
15Variations in H1, H2, and H3 Tags   Relevancy-0.2169563 %90 %
16Entities in the HTML Tag   Relevancy-0.251814275 %95 %
17Entities in Sentences   Relevancy-0.251513872 %95 %
18Variations in H1 and H2 Tags   Relevancy-0.273460 %90 %
19Variations in P Tags   Relevancy-0.1927543067 %90 %
20Entities in H1 Tags-0.197259 %92 %
21Load Time Milliseconds   Performance-0.1919474129985 %88 %
22Number of Factors Used   Diversity-0.1928117896 %88 %
23Number of Referring Domains   Authority-0.19242512346 %69 %
24Term Frequency   Relevancy-0.195377 %90 %
25Variations in Sentences   Relevancy-0.19106104571 %88 %
26Exact Matches in the HTML Tag   Relevancy-0.193491531 %85 %
27Variations in LI Tags   Relevancy-0.1928912265 %89 %
28Variations in A Tags   Relevancy-0.1854832765 %85 %
29Number of Backlinks   Authority-0.18770312863246 %70 %
30Variations in Search Result Display URL   Relevancy-0.1811274 %81 %
31Variations in Search Result Link Text   Relevancy-0.1811274 %81 %
32LSI Words in Sentences   Relevancy-0.18246275370 %94 %
33Variations in H1 Tags   Relevancy-0.187153 %89 %
34Variations in Search Result URL Path   Relevancy-0.189145 %85 %
35Variations in the Title Tag   Relevancy-0.1811263 %87 %
36Number of Images   Size-0.181552978 %86 %
37Entities in H2 Tags-0.1831753 %93 %
38Number of Do Follow Backlinks   Authority-0.18715834783542 %69 %
39Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1818242 %88 %
40Leading Variations in H1-H6 Tags   Relevancy-0.1720245 %89 %
41LSI Words in Title Tag   Relevancy-0.1714671 %94 %
42Clean Keyword Density in the HTML Tag   Relevancy-0.17150469 %79 %
43Variation Count in Top 30KB   Relevancy-0.1744212966 %87 %
44Number of No Follow Backlinks   Authority-0.175447895035 %66 %
45Number of Images with ALT Text   Size-0.171052074 %88 %
46Number of HTML Tags   Size-0.173192117485 %86 %
47Variations in Meta Description   Relevancy-0.1743252 %85 %
48Variations in H2 Tags   Relevancy-0.1768343 %86 %
49Entities in Meta Description Tag   Relevancy-0.1711359 %89 %
50Word Count   Size-0.174259137385 %86 %
51Variations in the Canonical URL   Relevancy-0.1748248 %85 %
52Variations in Span Tags   Relevancy-0.171081950 %87 %
53Variations in ALT Attributes   Relevancy-0.17410643 %84 %
54Variations in A Tag HREF Attributes   Relevancy-0.1738014658 %88 %
55Unabridged Word Count   Size-0.174792172685 %87 %
56Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182958 %89 %
57Variations in Search Result URL   Relevancy-0.1622152 %80 %
58Number of P Tags   Size-0.161223677 %89 %
59Clean Text Kilobytes   Size-0.161121278 %87 %
60Variations in Nav Tags   Relevancy-0.16131854247 %84 %
61TF/IDF   Relevancy-0.161156 %86 %
62Exact Matches in H1-H6 Tags   Relevancy-0.169121 %85 %
63LSI Words in H1 Tags   Relevancy-0.1614461 %92 %
64Number of Forms   Technology-0.1614358 %81 %
65Leading Variations in H1 Tags   Relevancy-0.161129 %82 %
66Has Entities in H1 Tags   Relevancy-0.161160 %89 %
67Leading Variations in Title Tag   Relevancy-0.161132 %80 %
68Number of HTTPS Links   Authority-0.1646316582 %87 %
69Entities in H3 Tags-0.1623644 %92 %
70Number of Heading Tags   Size-0.16532178 %87 %
71Number of DoFollow Links   Authority-0.1645016382 %87 %
72Number of Links   Authority-0.1646416782 %86 %
73Number of Internal Links   Authority-0.1643515381 %87 %
74Variations in First 100 Words   Relevancy-0.16152662 %84 %
75Exact Matches in Top 30KB   Relevancy-0.1629220 %77 %
76Variation Density in Top 30KB   Relevancy-0.16247359 %81 %
77Variations in Main Tags   Relevancy-0.16254398437 %88 %
78Percentage of DoFollow Internal Links   Authority-0.16937681 %86 %
79Percentage of DoFollow Links   Authority-0.161008682 %91 %
80Exact Matches in Title Tag   Relevancy-0.162119 %82 %
81Exact Matches in Sentences   Relevancy-0.1642323 %84 %
82Uses Microdata WPAdBlock   Other-0.15111 %15 %
83Uses Schema wpadblock   Other-0.15111 %15 %
84Search Result Number of Dirs in Path   Other-0.153275 %73 %
85Variations in Absolute URLs   Relevancy-0.1588476958 %87 %
86Title Tag Has Entities   Relevancy-0.151171 %88 %
87Number of H1 Tags   Size-0.154273 %88 %
88Number of HTML Comments   Size-0.159814674 %86 %
89Number of DoFollow External Links   Authority-0.15551377 %86 %
90Variations in Script Tags   Relevancy-0.154881516261 %85 %
91LSI Words in Meta Description Tag   Relevancy-0.15421158 %92 %
92Uses JSON-LD itemReviewed-0.15112 %14 %
93Number of External Links   Authority-0.15731478 %86 %
94Variations in OpenGraph Title   Relevancy-0.159150 %79 %
95Number of H2 Tags   Size-0.1518768 %85 %
96Variations in OpenGraph Description   Relevancy-0.1597246 %80 %
97LSI Words in H2 Tags   Relevancy-0.14801957 %92 %
98Variations in Footer Tags   Relevancy-0.1439751235 %82 %
99Variations in H3 Tags   Relevancy-0.1496331 %83 %
100Flesch Kincaid Reading Grade Level   Other-0.147292 %88 %
101Variations making whole H1-H6 Tags   Relevancy-0.142118 %79 %
102Exact Matches in H1 Tags   Relevancy-0.142115 %84 %
103Has Privacy Policy   Trust-0.141159 %72 %
104Variations in TITLE Attributes   Relevancy-0.14345738 %81 %
105Variations making whole H1, H2, and H3 Tags   Relevancy-0.141117 %78 %
106Leading Variations in H2 Tags   Relevancy-0.148121 %83 %
107Has Meta Charset   Technology-0.141177 %84 %
108Number of Sentences   Size-0.1462212284 %82 %
109Has Form   Technology-0.141156 %78 %
110Has Entities in H2 Tags   Relevancy-0.141153 %85 %
111Number of H3 Tags   Size-0.1423860 %82 %
112Variations Making Whole Span Tags   Relevancy-0.144121 %82 %
113Variations in Section Tags   Relevancy-0.1415601735 %83 %
114Is Store Page   Other-0.141153 %70 %
115Average Words Per Sentence   Size-0.141663280 %82 %
116Number of Images without ALT Text   Size-0.14641058 %79 %
117Search Result Uses HTTPS   Other-0.141184 %84 %
118Number of Questions In Headings   Size-0.148234 %79 %
119Meta Description Tag Has Entities   Relevancy-0.141159 %81 %
120Number of Facebook Pages   Authority-0.139261 %77 %
121Variations in Strong Tags   Relevancy-0.1395224 %82 %
122Entities in H4 Tags-0.1310222 %85 %
123Has Canonical URL   Authority-0.131173 %78 %
124Has Meta Viewport   Technology-0.131183 %83 %
125Number of Includes   Technology-0.13482783 %72 %
126Variations making whole H1 Tags   Relevancy-0.131112 %79 %
127Has Meta Description   Relevancy-0.131167 %80 %
128Variations Making Whole LI Tags   Relevancy-0.134125 %78 %
129Has FavIcon   Technology-0.131177 %80 %
130Number of Absolute URLs   Authority-0.13114928384 %78 %
131Search Result Domain Length   Size-0.13261785 %77 %
132Search Result Host Length   Size-0.13261785 %77 %
133Number Of JSON-LD Types   Relevancy-0.131461356 %74 %
134Title Word Count   Size-0.1313884 %78 %
135Title Length   Size-0.13935084 %80 %
136Is Home Page   Other-0.131120 %40 %
137Number of H4 Tags   Size-0.1316437 %80 %
138Number of Prices   Size-0.133876568 %80 %
139LSI Words in H3 Tags   Relevancy-0.13781949 %89 %
140Has Entities in H3 Tags   Relevancy-0.131145 %80 %
141Variations making whole A Tags   Relevancy-0.13111228 %73 %
142Has JSON-LD Schema Markup   Relevancy-0.131154 %69 %
143Uses Schema image   Other-0.131122 %68 %
144Exact Matches in H2 Tags   Relevancy-0.135111 %83 %
145Percentage of DoFollow External Links   Authority-0.13271176 %78 %
146Page Size Kilobytes   Size-0.1384830884 %75 %
147Uses Schema sku   Other-0.13117 %41 %
148Number of Questions In H2 Tags   Size-0.134121 %78 %
149Uses Schema itemreviewed   Other-0.12113 %22 %
150Number of Questions   Size-0.12821068 %79 %
151Headings Has Question   Other-0.121134 %74 %
152Meta Description Length   Size-0.1230912268 %79 %
153Has Contact Page   Trust-0.121163 %70 %
154Uses Schema name   Other-0.121161 %69 %
155Word Count in Meta Description   Size-0.12482067 %78 %
156Number of JavaScript Includes   Technology-0.12381782 %73 %
157Number of CSS Includes   Technology-0.12201076 %73 %
158Number of Social Pages   Authority-0.1216466 %79 %
159Exact Matches in Meta Description   Relevancy-0.122112 %83 %
160Uses Schema aggregaterating   Other-0.121111 %65 %
161Uses JSON-LD sku   Other-0.12116 %41 %
162Is Purchase Page   Other-0.121144 %68 %
163Number of Instagram Pages   Authority-0.1216249 %76 %
164Number of Social Accounts   Authority-0.128242 %78 %
165Has Schema Markup   Relevancy-0.121165 %72 %
166Number of Email Addresses   Trust-0.1272445 %81 %
167Search Result URL Length   Size-0.12896197 %55 %
168Has Meta Robots   Other-0.121128 %69 %
169Number of LinkedIn Pages   Authority-0.124128 %71 %
170Uses Schema availability   Other-0.12118 %49 %
171Number of Facebook Accounts   Authority-0.127129 %75 %
172Variations in I Tags   Relevancy-0.1293424 %78 %
173Uses JSON-LD name   Other-0.121153 %69 %
174Uses Schema ratingvalue   Other-0.12119 %62 %
175Uses Schema pricecurrency   Other-0.121110 %51 %
176Uses Microdata sku   Other-0.12114 %15 %
177Uses JSON-LD image   Other-0.121116 %72 %
178Number of Nofollow Links   Authority-0.1223526 %76 %
179Uses Schema gtin13   Other-0.12113 %15 %
180Variations in H4-H6 Tags   Relevancy-0.1221115 %76 %
181Inline CSS Kilobytes   Size-0.121945864 %67 %
182Variations in Button Tags   Relevancy-0.12427088 %82 %
183Number of US Phone Numbers   Trust-0.126701236 %76 %
184Uses JSON-LD itemCondition   Other-0.12114 %31 %
185LSI Words in H4 Tags   Relevancy-0.1265730 %85 %
186Uses Schema product   Other-0.121111 %56 %
187Inline JavaScript Kilobytes   Size-0.1244710281 %74 %
188Uses JSON-LD BreadcrumbList   Other-0.111134 %63 %
189Uses Schema applicationcategory   Other-0.11115 %12 %
190Variations in the last 100 words   Relevancy-0.11144344 %79 %
191Uses JSON-LD ListItem   Other-0.111135 %65 %
192Uses JSON-LD applicationCategory   Other-0.11115 %12 %
193Is Pagination Page   Other-0.111119 %61 %
194Has OpenGraph Type   Relevancy-0.111161 %69 %
195Uses Schema itemcondition   Other-0.11114 %31 %
196Uses Schema offer   Other-0.111110 %59 %
197Has HREF Lang   Technology-0.111114 %69 %
198Uses Schema price   Other-0.11119 %49 %
199Search Result Summary Length   Size-0.1116215296 %63 %
200Number of HREF Lang Tags   Size-0.1144312 %74 %