Measures 147731 SEO Factors

146009 Built-In SEO Factors

136843 On-page SEO Factors

9166 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-0.23101532284 %82 %
2Number of Unique Variations Used   Diversity-0.2224780 %88 %
3Number of Distinct Entities Used   Diversity-0.22632979 %94 %
4Number of Top 200 Shared Factors Used   Diversity-0.22534097 %93 %
5Entities in Title Tag   Relevancy-0.217370 %93 %
6Number of Top 100 Shared Factors Used   Diversity-0.21393097 %93 %
7Number of Top 50 Shared Factors Used   Diversity-0.21171396 %93 %
8Search Result Domain is .com, .net, or .org   Other-0.2114 %64 %
9Load Time Milliseconds   Performance-0.223823144785 %89 %
10Variations in Div Tags   Relevancy-0.25222313774 %89 %
11Variations in H1, H2, and H3 Tags   Relevancy-0.19169663 %89 %
12Variations in H1-H6 Tags   Relevancy-0.19189764 %88 %
13Variations in Body Tags   Relevancy-0.1913377231679 %89 %
14Variations in H1 and H2 Tags   Relevancy-0.1978461 %87 %
15Variations in HTML Tags   Relevancy-0.1913377231378 %90 %
16Variations in P Tags   Relevancy-0.1927543268 %91 %
17Search Result Domain is .com   Other-0.19114 %63 %
18Entities in the HTML Tag   Relevancy-0.1988214474 %95 %
19Entities in Sentences   Relevancy-0.1968014071 %94 %
20Entities in H1 Tags-0.197258 %91 %
21Variations in Search Result Document File Name   Relevancy-0.199145 %81 %
22Number of Factors Used   Diversity-0.1930718097 %89 %
23Variations in Sentences   Relevancy-0.18106104172 %89 %
24Term Frequency   Relevancy-0.185378 %90 %
25Variations in LI Tags   Relevancy-0.1828912266 %88 %
26Number of Referring Domains   Authority-0.18242510845 %72 %
27Variations in A Tags   Relevancy-0.1854832465 %85 %
28Entities in H2 Tags-0.1831754 %93 %
29Variations in Search Result Display URL   Relevancy-0.1815277 %83 %
30Variations in Search Result Link Text   Relevancy-0.1815277 %82 %
31Variations in the Title Tag   Relevancy-0.1816264 %87 %
32Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1818244 %86 %
33Variations in H1 Tags   Relevancy-0.1712154 %87 %
34Variations in Search Result URL Path   Relevancy-0.179146 %85 %
35Leading Variations in H1-H6 Tags   Relevancy-0.1720246 %87 %
36LSI Words in Title Tag   Relevancy-0.1714670 %94 %
37Number of Backlinks   Authority-0.17770312647346 %73 %
38LSI Words in Sentences   Relevancy-0.17406874869 %94 %
39Variation Count in Top 30KB   Relevancy-0.1759572767 %87 %
40Number of Images   Size-0.172612978 %86 %
41Number of HTML Tags   Size-0.173505111285 %86 %
42Variations in H2 Tags   Relevancy-0.1768345 %85 %
43Clean Keyword Density in the HTML Tag   Relevancy-0.17150470 %81 %
44Number of Do Follow Backlinks   Authority-0.17715834593741 %72 %
45Variations in Meta Description   Relevancy-0.1743254 %85 %
46Variations in the Canonical URL   Relevancy-0.1748250 %86 %
47Word Count   Size-0.1710320141885 %86 %
48Exact Matches in the HTML Tag   Relevancy-0.163491329 %86 %
49Unabridged Word Count   Size-0.1640907181485 %87 %
50Entities in Meta Description Tag   Relevancy-0.1611359 %89 %
51Number of No Follow Backlinks   Authority-0.165447866235 %68 %
52Clean Text Kilobytes   Size-0.162111277 %86 %
53TF/IDF   Relevancy-0.161157 %86 %
54Variations in A Tag HREF Attributes   Relevancy-0.1638014359 %87 %
55Number of Images with ALT Text   Size-0.161792073 %87 %
56Variations in First 100 Words   Relevancy-0.16152665 %83 %
57Entities in H3 Tags-0.1627644 %92 %
58Variations in Span Tags   Relevancy-0.161081951 %87 %
59Leading Variations in H1 Tags   Relevancy-0.162129 %81 %
60Number of P Tags   Size-0.163113877 %88 %
61Number of Heading Tags   Size-0.16532178 %86 %
62LSI Words in H1 Tags   Relevancy-0.1617560 %92 %
63Variations in Search Result URL   Relevancy-0.1622153 %81 %
64Variations in ALT Attributes   Relevancy-0.16410644 %85 %
65Variation Density in Top 30KB   Relevancy-0.16296361 %82 %
66Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182659 %88 %
67Number of HTTPS Links   Authority-0.1695915481 %85 %
68Has Entities in H1 Tags   Relevancy-0.161158 %88 %
69Number of Links   Authority-0.1696215682 %85 %
70Number of DoFollow Links   Authority-0.1695615282 %85 %
71Number of Internal Links   Authority-0.1694214281 %85 %
72Leading Variations in Title Tag   Relevancy-0.161132 %81 %
73Variations in Nav Tags   Relevancy-0.16131853547 %84 %
74Percentage of DoFollow Internal Links   Authority-0.15937581 %86 %
75Variations in Absolute URLs   Relevancy-0.1588476560 %88 %
76Variations in OpenGraph Title   Relevancy-0.1511153 %80 %
77Variations in Main Tags   Relevancy-0.15254397538 %86 %
78Number of Forms   Technology-0.1514356 %80 %
79Variations in Script Tags   Relevancy-0.154881512062 %86 %
80Variations in OpenGraph Description   Relevancy-0.1597248 %80 %
81Percentage of DoFollow Links   Authority-0.151008582 %91 %
82Number of H1 Tags   Size-0.155272 %87 %
83Number of H2 Tags   Size-0.1518769 %85 %
84Search Result Number of Dirs in Path   Other-0.154274 %76 %
85Number of HTML Comments   Size-0.159814574 %85 %
86Title Tag Has Entities   Relevancy-0.151170 %88 %
87LSI Words in H2 Tags   Relevancy-0.15832058 %92 %
88LSI Words in Meta Description Tag   Relevancy-0.15421158 %91 %
89Variations in H3 Tags   Relevancy-0.1596333 %83 %
90Number of DoFollow External Links   Authority-0.15701376 %84 %
91Exact Matches in H1-H6 Tags   Relevancy-0.1511119 %85 %
92Number of External Links   Authority-0.15811477 %85 %
93Number of Includes   Technology-0.14492782 %75 %
94Exact Matches in Top 30KB   Relevancy-0.1429218 %78 %
95Number of Sentences   Size-0.14102812883 %84 %
96Flesch Kincaid Reading Grade Level   Other-0.147293 %87 %
97Has JSON-LD Schema Markup   Relevancy-0.141155 %74 %
98Number of H3 Tags   Size-0.1438860 %83 %
99Variations in Footer Tags   Relevancy-0.1439751136 %82 %
100Variations making whole H1-H6 Tags   Relevancy-0.142117 %77 %
101Has Entities in H2 Tags   Relevancy-0.141154 %85 %
102Number of Facebook Pages   Authority-0.149260 %79 %
103Leading Variations in H2 Tags   Relevancy-0.148122 %82 %
104Number of Images without ALT Text   Size-0.141061059 %81 %
105Average Words Per Sentence   Size-0.141663180 %80 %
106Exact Matches in Sentences   Relevancy-0.1442321 %86 %
107Number Of JSON-LD Types   Relevancy-0.141461457 %79 %
108Has Meta Charset   Technology-0.141176 %83 %
109Has Privacy Policy   Trust-0.141158 %74 %
110Variations making whole H1, H2, and H3 Tags   Relevancy-0.142116 %78 %
111Variations in Section Tags   Relevancy-0.1415601737 %83 %
112Number of CSS Includes   Technology-0.14201075 %76 %
113Search Result Host Length   Size-0.14261785 %78 %
114Search Result Domain Length   Size-0.13261785 %78 %
115Variations in TITLE Attributes   Relevancy-0.13345637 %81 %
116Number of Absolute URLs   Authority-0.13114928484 %80 %
117Search Result Uses HTTPS   Other-0.131185 %84 %
118Number of Questions In Headings   Size-0.139237 %81 %
119Exact Matches in Title Tag   Relevancy-0.132117 %84 %
120Has Form   Technology-0.131154 %77 %
121Has Canonical URL   Authority-0.131172 %79 %
122Has Meta Viewport   Technology-0.131183 %83 %
123Page Size Kilobytes   Size-0.13120830784 %77 %
124LSI Words in H3 Tags   Relevancy-0.13942050 %90 %
125Title Length   Size-0.131085184 %79 %
126Variations Making Whole Span Tags   Relevancy-0.134120 %82 %
127Variations in Strong Tags   Relevancy-0.1395226 %82 %
128Variations making whole H1 Tags   Relevancy-0.131110 %77 %
129Number of Questions   Size-0.131431169 %81 %
130Title Word Count   Size-0.1315883 %78 %
131Has Meta Description   Relevancy-0.131166 %78 %
132Meta Description Tag Has Entities   Relevancy-0.131158 %80 %
133Entities in H4 Tags-0.1310222 %86 %
134Is Store Page   Other-0.131149 %70 %
135Number of Questions In H2 Tags   Size-0.134123 %77 %
136Number of Instagram Pages   Authority-0.1316248 %77 %
137Variations making whole A Tags   Relevancy-0.13111228 %74 %
138Inline CSS Kilobytes   Size-0.132276165 %74 %
139Variations Making Whole LI Tags   Relevancy-0.136124 %76 %
140Number of JavaScript Includes   Technology-0.13381782 %76 %
141Number of Prices   Size-0.1317937068 %81 %
142Meta Description Length   Size-0.1366012267 %78 %
143Has Entities in H3 Tags   Relevancy-0.131145 %82 %
144Has FavIcon   Technology-0.131177 %81 %
145Uses JSON-LD name   Other-0.131154 %72 %
146Number of H4 Tags   Size-0.1320437 %79 %
147Uses Schema name   Other-0.131162 %69 %
148Word Count in Meta Description   Size-0.12481967 %78 %
149Percentage of DoFollow External Links   Authority-0.12321175 %76 %
150Has Schema Markup   Relevancy-0.121165 %73 %
151Has Contact Page   Trust-0.121163 %72 %
152Number of Social Pages   Authority-0.1217465 %79 %
153Headings Has Question   Other-0.121136 %76 %
154Exact Matches in H1 Tags   Relevancy-0.122113 %84 %
155Uses Schema sku   Other-0.12116 %32 %
156Is Purchase Page   Other-0.121143 %66 %
157Number of Social Accounts   Authority-0.1215242 %79 %
158Inline JavaScript Kilobytes   Size-0.1270810881 %75 %
159Variations in I Tags   Relevancy-0.12299425 %79 %
160Variations in the last 100 words   Relevancy-0.12195346 %80 %
161Number of Facebook Accounts   Authority-0.128129 %77 %
162Is Home Page   Other-0.121119 %40 %
163Uses Schema image   Other-0.121123 %64 %
164Number of LinkedIn Pages   Authority-0.1214129 %74 %
165Uses Schema itemreviewed   Other-0.12112 %17 %
166Variations in Button Tags   Relevancy-0.12427058 %78 %
167Number of Email Addresses   Trust-0.1274445 %80 %
168Number of Nofollow Links   Authority-0.1223426 %76 %
169Uses JSON-LD BreadcrumbList   Other-0.121136 %65 %
170Uses JSON-LD ListItem   Other-0.121136 %67 %
171Has OpenGraph Type   Relevancy-0.121162 %71 %
172Uses JSON-LD description   Other-0.121143 %65 %
173Uses Schema aggregaterating   Other-0.121110 %59 %
174Uses JSON-LD sku   Other-0.12115 %34 %
175Number of HREF Lang Tags   Size-0.1244212 %74 %
176Number of US Phone Numbers   Trust-0.126701237 %78 %
177Uses JSON-LD image   Other-0.121117 %70 %
178Variations in Meta Twitter Content   Relevancy-0.124124 %68 %
179Search Result URL Length   Size-0.121056397 %58 %
180Has OpenGraph Image   Relevancy-0.111153 %69 %
181Variations in Meta Twitter Description   Relevancy-0.1130122 %72 %
182Number of Questions In H3 Tags   Size-0.116117 %77 %
183Leading Variations in H3 Tags   Relevancy-0.1110115 %77 %
184Uses Schema pricecurrency   Other-0.11118 %48 %
185Variations in Article Tags   Relevancy-0.116171123 %72 %
186Uses Schema availability   Other-0.11116 %46 %
187Uses JSON-LD url-0.111146 %72 %
188Has Terms of Service   Trust-0.111134 %64 %
189Uses Schema listitem   Other-0.111144 %63 %
190Has HREF Lang   Technology-0.111113 %68 %
191Uses Schema breadcrumblist   Other-0.111143 %63 %
192Uses Schema url   Other-0.111157 %64 %
193Variations in H4-H6 Tags   Relevancy-0.1132116 %76 %
194Uses Schema organization   Other-0.111136 %64 %
195Has US Phone Number   Trust-0.111138 %64 %
196Exact Matches in H2 Tags   Relevancy-0.115111 %84 %
197Uses Schema product   Other-0.11119 %52 %
198Has Google Verify   Technology-0.111123 %69 %
199Uses JSON-LD itemCondition   Other-0.11114 %26 %
200Is Article Page   Other-0.111144 %63 %