Measures 147680 SEO Factors

145958 Built-In SEO Factors

136793 On-page SEO Factors

9165 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-0.23101532785 %82 %
2Number of Unique Variations Used   Diversity-0.2224780 %87 %
3Number of Distinct Entities Used   Diversity-0.22633079 %94 %
4Entities in Title Tag   Relevancy-0.227371 %93 %
5Number of Top 200 Shared Factors Used   Diversity-0.21534097 %93 %
6Number of Top 100 Shared Factors Used   Diversity-0.21393097 %92 %
7Number of Top 50 Shared Factors Used   Diversity-0.21171396 %92 %
8Search Result Domain is .com, .net, or .org   Other-0.2114 %63 %
9Variations in Div Tags   Relevancy-0.25222314274 %89 %
10Load Time Milliseconds   Performance-0.1923823143386 %88 %
11Variations in Body Tags   Relevancy-0.1913377233279 %88 %
12Variations in HTML Tags   Relevancy-0.1913377232978 %89 %
13Variations in H1, H2, and H3 Tags   Relevancy-0.19169664 %88 %
14Variations in H1-H6 Tags   Relevancy-0.19189764 %88 %
15Entities in the HTML Tag   Relevancy-0.1977314675 %94 %
16Search Result Domain is .com   Other-0.19114 %62 %
17Entities in Sentences   Relevancy-0.1963014272 %94 %
18Variations in H1 and H2 Tags   Relevancy-0.1978461 %87 %
19Variations in P Tags   Relevancy-0.1927543268 %90 %
20Entities in H1 Tags-0.197259 %91 %
21Variations in Search Result Document File Name   Relevancy-0.199146 %80 %
22Number of Factors Used   Diversity-0.1930718097 %89 %
23Variations in Sentences   Relevancy-0.18106104272 %89 %
24Term Frequency   Relevancy-0.185378 %89 %
25Variations in LI Tags   Relevancy-0.1828912266 %87 %
26Variations in A Tags   Relevancy-0.1854832465 %84 %
27Number of Referring Domains   Authority-0.18242511145 %70 %
28Entities in H2 Tags-0.1831754 %93 %
29Variations in Search Result Display URL   Relevancy-0.1815276 %81 %
30Variations in Search Result Link Text   Relevancy-0.1815276 %81 %
31Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1718244 %86 %
32Variations in the Title Tag   Relevancy-0.1716264 %86 %
33Variations in H1 Tags   Relevancy-0.1712154 %86 %
34Leading Variations in H1-H6 Tags   Relevancy-0.1720246 %87 %
35LSI Words in Title Tag   Relevancy-0.1714671 %93 %
36Variations in Search Result URL Path   Relevancy-0.179146 %84 %
37Number of Backlinks   Authority-0.17770312682545 %72 %
38LSI Words in Sentences   Relevancy-0.17406875569 %94 %
39Number of Images   Size-0.172613078 %85 %
40Exact Matches in the HTML Tag   Relevancy-0.173491330 %85 %
41Number of HTML Tags   Size-0.173505113185 %86 %
42Clean Keyword Density in the HTML Tag   Relevancy-0.17150470 %79 %
43Variations in Meta Description   Relevancy-0.1743253 %83 %
44Variation Count in Top 30KB   Relevancy-0.1759572867 %86 %
45Number of Do Follow Backlinks   Authority-0.17715834621541 %71 %
46Entities in Meta Description Tag   Relevancy-0.1711359 %88 %
47Variations in H2 Tags   Relevancy-0.1668345 %84 %
48Variations in the Canonical URL   Relevancy-0.1648250 %85 %
49Word Count   Size-0.164352141385 %86 %
50Unabridged Word Count   Size-0.166247178385 %86 %
51Number of Images with ALT Text   Size-0.161792074 %87 %
52Number of No Follow Backlinks   Authority-0.165447871435 %66 %
53Variations in Span Tags   Relevancy-0.161081951 %87 %
54Leading Variations in H1 Tags   Relevancy-0.162129 %81 %
55Clean Text Kilobytes   Size-0.161121278 %87 %
56Variations in A Tag HREF Attributes   Relevancy-0.1638014459 %87 %
57Number of P Tags   Size-0.161223877 %88 %
58Entities in H3 Tags-0.1627745 %91 %
59TF/IDF   Relevancy-0.161157 %85 %
60Variations in ALT Attributes   Relevancy-0.16410644 %84 %
61Variations in First 100 Words   Relevancy-0.16152664 %83 %
62Variations in Search Result URL   Relevancy-0.1622153 %80 %
63Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182759 %88 %
64LSI Words in H1 Tags   Relevancy-0.1617561 %92 %
65Has Entities in H1 Tags   Relevancy-0.161159 %87 %
66Number of Heading Tags   Size-0.16532178 %86 %
67Variations in Nav Tags   Relevancy-0.16131853747 %84 %
68Leading Variations in Title Tag   Relevancy-0.161132 %81 %
69Variation Density in Top 30KB   Relevancy-0.16296360 %81 %
70Number of HTTPS Links   Authority-0.1695915782 %86 %
71Number of Links   Authority-0.1696215982 %85 %
72Number of Internal Links   Authority-0.1694214581 %85 %
73Number of DoFollow Links   Authority-0.1695615582 %86 %
74Number of Forms   Technology-0.1514357 %80 %
75Percentage of DoFollow Internal Links   Authority-0.15937681 %86 %
76Variations in Absolute URLs   Relevancy-0.1588476660 %87 %
77Variations in Main Tags   Relevancy-0.15254397838 %86 %
78Exact Matches in H1-H6 Tags   Relevancy-0.1511119 %84 %
79Variations in Script Tags   Relevancy-0.154881512862 %85 %
80Variations in OpenGraph Title   Relevancy-0.1511153 %79 %
81Percentage of DoFollow Links   Authority-0.151008582 %91 %
82Title Tag Has Entities   Relevancy-0.151171 %88 %
83Number of H1 Tags   Size-0.155272 %86 %
84Number of HTML Comments   Size-0.159814575 %84 %
85Variations in OpenGraph Description   Relevancy-0.1597248 %79 %
86Search Result Number of Dirs in Path   Other-0.154275 %75 %
87Number of H2 Tags   Size-0.1518769 %85 %
88LSI Words in Meta Description Tag   Relevancy-0.15421158 %91 %
89Number of DoFollow External Links   Authority-0.15551277 %84 %
90Number of External Links   Authority-0.14731478 %85 %
91Exact Matches in Top 30KB   Relevancy-0.1429218 %78 %
92LSI Words in H2 Tags   Relevancy-0.14832058 %92 %
93Variations in H3 Tags   Relevancy-0.1496333 %82 %
94Uses JSON-LD itemReviewed-0.14112 %11 %
95Variations making whole H1-H6 Tags   Relevancy-0.142117 %78 %
96Number of Includes   Technology-0.14492782 %74 %
97Exact Matches in Sentences   Relevancy-0.1442321 %85 %
98Number of Sentences   Size-0.14102812884 %83 %
99Variations in Footer Tags   Relevancy-0.1439751236 %82 %
100Flesch Kincaid Reading Grade Level   Other-0.147292 %87 %
101Has Entities in H2 Tags   Relevancy-0.141154 %84 %
102Exact Matches in Title Tag   Relevancy-0.142118 %83 %
103Has JSON-LD Schema Markup   Relevancy-0.141155 %72 %
104Variations making whole H1, H2, and H3 Tags   Relevancy-0.141116 %78 %
105Leading Variations in H2 Tags   Relevancy-0.148122 %82 %
106Number of H3 Tags   Size-0.1438861 %82 %
107Number of Facebook Pages   Authority-0.149261 %78 %
108Number of Images without ALT Text   Size-0.141061059 %81 %
109Has Meta Charset   Technology-0.141177 %83 %
110Average Words Per Sentence   Size-0.141663180 %80 %
111Variations in TITLE Attributes   Relevancy-0.14345637 %81 %
112Number Of JSON-LD Types   Relevancy-0.131461457 %78 %
113Variations in Section Tags   Relevancy-0.1315601737 %83 %
114Has Privacy Policy   Trust-0.131158 %72 %
115Number of CSS Includes   Technology-0.13201075 %74 %
116Has Form   Technology-0.131155 %76 %
117Number of Absolute URLs   Authority-0.13114928584 %79 %
118Search Result Host Length   Size-0.13261785 %77 %
119Search Result Domain Length   Size-0.13261785 %78 %
120Variations making whole H1 Tags   Relevancy-0.131110 %77 %
121Search Result Uses HTTPS   Other-0.131185 %84 %
122Page Size Kilobytes   Size-0.13100430784 %77 %
123Variations Making Whole Span Tags   Relevancy-0.134120 %81 %
124Number of Questions In Headings   Size-0.138236 %80 %
125Meta Description Tag Has Entities   Relevancy-0.131159 %79 %
126Has Canonical URL   Authority-0.131173 %79 %
127Has Meta Viewport   Technology-0.131183 %82 %
128Is Store Page   Other-0.131150 %70 %
129Entities in H4 Tags-0.1310222 %85 %
130Title Length   Size-0.13935184 %78 %
131Variations in Strong Tags   Relevancy-0.1395225 %81 %
132Title Word Count   Size-0.1314884 %78 %
133LSI Words in H3 Tags   Relevancy-0.13942050 %89 %
134Number of Questions   Size-0.131431169 %81 %
135Has Meta Description   Relevancy-0.131167 %78 %
136Exact Matches in H1 Tags   Relevancy-0.132114 %83 %
137Number of Instagram Pages   Authority-0.1316248 %76 %
138Number of Prices   Size-0.1310356769 %80 %
139Variations making whole A Tags   Relevancy-0.13111228 %74 %
140Variations Making Whole LI Tags   Relevancy-0.136125 %76 %
141Has Entities in H3 Tags   Relevancy-0.131146 %81 %
142Has FavIcon   Technology-0.131177 %80 %
143Inline CSS Kilobytes   Size-0.122276066 %72 %
144Number of H4 Tags   Size-0.1216438 %79 %
145Meta Description Length   Size-0.1266012268 %78 %
146Percentage of DoFollow External Links   Authority-0.12321175 %76 %
147Number of JavaScript Includes   Technology-0.12381882 %75 %
148Uses Schema sku   Other-0.12116 %34 %
149Uses Schema name   Other-0.121162 %68 %
150Uses JSON-LD name   Other-0.121154 %71 %
151Number of Questions In H2 Tags   Size-0.124123 %77 %
152Has Schema Markup   Relevancy-0.121165 %73 %
153Word Count in Meta Description   Size-0.12482067 %77 %
154Is Purchase Page   Other-0.121143 %67 %
155Has Contact Page   Trust-0.121164 %71 %
156Inline JavaScript Kilobytes   Size-0.1270210682 %75 %
157Headings Has Question   Other-0.121136 %76 %
158Number of Social Pages   Authority-0.1217466 %78 %
159Variations in I Tags   Relevancy-0.12299425 %78 %
160Uses Schema image   Other-0.121123 %64 %
161Number of Social Accounts   Authority-0.1215243 %78 %
162Is Home Page   Other-0.121119 %39 %
163Variations in the last 100 words   Relevancy-0.12195345 %79 %
164Uses Schema itemreviewed   Other-0.12112 %19 %
165Number of Facebook Accounts   Authority-0.128129 %76 %
166Number of Email Addresses   Trust-0.1272445 %80 %
167Variations in Button Tags   Relevancy-0.12427068 %79 %
168Uses Schema aggregaterating   Other-0.121111 %60 %
169Number of LinkedIn Pages   Authority-0.1214129 %73 %
170Number of Nofollow Links   Authority-0.1223426 %76 %
171Uses JSON-LD sku   Other-0.12115 %36 %
172Number of HREF Lang Tags   Size-0.1244212 %74 %
173Exact Matches in H2 Tags   Relevancy-0.125111 %83 %
174Uses JSON-LD BreadcrumbList   Other-0.121136 %65 %
175Has OpenGraph Type   Relevancy-0.111162 %71 %
176Has HREF Lang   Technology-0.111114 %69 %
177Uses JSON-LD ListItem   Other-0.111137 %67 %
178Uses JSON-LD image   Other-0.111117 %70 %
179Uses JSON-LD description   Other-0.111143 %65 %
180Uses Schema availability   Other-0.11117 %48 %
181Search Result URL Length   Size-0.111056297 %58 %
182Uses Schema pricecurrency   Other-0.11118 %50 %
183Uses Schema gtin13   Other-0.11113 %12 %
184Number of US Phone Numbers   Trust-0.116701237 %78 %
185Variations in Article Tags   Relevancy-0.116171122 %71 %
186Variations in Meta Twitter Content   Relevancy-0.114124 %67 %
187Has Meta Robots   Other-0.111127 %70 %
188Uses Schema listitem   Other-0.111144 %63 %
189Uses Schema ratingvalue   Other-0.111110 %58 %
190Variations in Meta Twitter Description   Relevancy-0.1130122 %71 %
191Uses JSON-LD priceCurrency   Other-0.11118 %53 %
192Is OpenGraph Type Article   Technology-0.111135 %53 %
193Uses JSON-LD itemCondition   Other-0.11114 %28 %
194Uses Schema breadcrumblist   Other-0.111144 %63 %
195Uses Schema product   Other-0.111110 %53 %
196Uses Microdata sku   Other-0.11113 %11 %
197Variations in H4-H6 Tags   Relevancy-0.1132116 %75 %
198Uses Schema price   Other-0.11117 %47 %
199Leading Variations in H3 Tags   Relevancy-0.1110115 %77 %
200Has OpenGraph Image   Relevancy-0.111153 %68 %