Measures 147728 SEO Factors

146006 Built-In SEO Factors

136840 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-0.23101532384 %82 %
2Number of Unique Variations Used   Diversity-0.2224780 %88 %
3Number of Distinct Entities Used   Diversity-0.22632979 %95 %
4Entities in Title Tag   Relevancy-0.227370 %93 %
5Number of Top 200 Shared Factors Used   Diversity-0.21534097 %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 %63 %
9Load Time Milliseconds   Performance-0.223823145385 %88 %
10Variations in Div Tags   Relevancy-0.25222313774 %89 %
11Variations in H1, H2, and H3 Tags   Relevancy-0.19169663 %88 %
12Variations in Body Tags   Relevancy-0.1913377231879 %89 %
13Variations in H1-H6 Tags   Relevancy-0.19189764 %88 %
14Variations in H1 and H2 Tags   Relevancy-0.1978461 %87 %
15Variations in HTML Tags   Relevancy-0.1913377231578 %90 %
16Variations in P Tags   Relevancy-0.1927543268 %90 %
17Entities in the HTML Tag   Relevancy-0.1977314575 %95 %
18Search Result Domain is .com   Other-0.19114 %63 %
19Entities in Sentences   Relevancy-0.1963014172 %94 %
20Entities in H1 Tags-0.197258 %91 %
21Number of Factors Used   Diversity-0.1930718097 %89 %
22Variations in Search Result Document File Name   Relevancy-0.199145 %81 %
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-0.18242510945 %71 %
27Variations in A Tags   Relevancy-0.1854832465 %84 %
28Entities in H2 Tags-0.1831754 %93 %
29Variations in Search Result Display URL   Relevancy-0.1815277 %82 %
30Variations in Search Result Link Text   Relevancy-0.1815276 %82 %
31Variations in the Title Tag   Relevancy-0.1816265 %87 %
32Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1818244 %86 %
33LSI Words in Title Tag   Relevancy-0.1714671 %94 %
34Variations in H1 Tags   Relevancy-0.1712154 %87 %
35Leading Variations in H1-H6 Tags   Relevancy-0.1720246 %87 %
36LSI Words in Sentences   Relevancy-0.17406875570 %94 %
37Number of Backlinks   Authority-0.17770312655945 %73 %
38Variations in Search Result URL Path   Relevancy-0.179146 %85 %
39Variation Count in Top 30KB   Relevancy-0.1759572867 %87 %
40Number of Images   Size-0.172612978 %85 %
41Clean Keyword Density in the HTML Tag   Relevancy-0.17150470 %80 %
42Number of HTML Tags   Size-0.173505111485 %86 %
43Variations in H2 Tags   Relevancy-0.1768345 %85 %
44Number of Do Follow Backlinks   Authority-0.17715834600741 %72 %
45Variations in Meta Description   Relevancy-0.1743254 %84 %
46Exact Matches in the HTML Tag   Relevancy-0.173491329 %86 %
47Entities in Meta Description Tag   Relevancy-0.1711359 %89 %
48Variations in the Canonical URL   Relevancy-0.1748250 %85 %
49Word Count   Size-0.164352141485 %86 %
50Unabridged Word Count   Size-0.1640907180785 %87 %
51Number of No Follow Backlinks   Authority-0.165447867035 %68 %
52Entities in H3 Tags-0.1627745 %92 %
53Number of Images with ALT Text   Size-0.161792073 %87 %
54Clean Text Kilobytes   Size-0.162111277 %87 %
55TF/IDF   Relevancy-0.161157 %86 %
56Variations in A Tag HREF Attributes   Relevancy-0.1638014359 %87 %
57Variations in Span Tags   Relevancy-0.161081951 %87 %
58LSI Words in H1 Tags   Relevancy-0.1617561 %92 %
59Leading Variations in H1 Tags   Relevancy-0.162129 %81 %
60Variations in First 100 Words   Relevancy-0.16152664 %83 %
61Number of P Tags   Size-0.163113877 %88 %
62Number of Heading Tags   Size-0.16532178 %86 %
63Variations in ALT Attributes   Relevancy-0.16410644 %84 %
64Has Entities in H1 Tags   Relevancy-0.161158 %88 %
65Variation Density in Top 30KB   Relevancy-0.16296361 %82 %
66Variations in Search Result URL   Relevancy-0.1622153 %80 %
67Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182659 %88 %
68Number of HTTPS Links   Authority-0.1695915581 %85 %
69Leading Variations in Title Tag   Relevancy-0.161132 %81 %
70Number of Links   Authority-0.1696215682 %85 %
71Number of DoFollow Links   Authority-0.1695615282 %85 %
72Number of Internal Links   Authority-0.1694214281 %85 %
73Variations in Nav Tags   Relevancy-0.16131853547 %84 %
74Percentage of DoFollow Internal Links   Authority-0.15937581 %86 %
75Variations in Absolute URLs   Relevancy-0.1588476560 %87 %
76Variations in OpenGraph Title   Relevancy-0.1511153 %79 %
77Number of Forms   Technology-0.1514356 %80 %
78Variations in Script Tags   Relevancy-0.154881512162 %85 %
79Variations in Main Tags   Relevancy-0.15254397538 %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 %
83Title Tag Has Entities   Relevancy-0.151170 %88 %
84Number of H2 Tags   Size-0.1518769 %85 %
85Search Result Number of Dirs in Path   Other-0.154274 %75 %
86Number of HTML Comments   Size-0.159814574 %84 %
87LSI Words in H2 Tags   Relevancy-0.15832158 %92 %
88LSI Words in Meta Description Tag   Relevancy-0.15421159 %91 %
89Exact Matches in H1-H6 Tags   Relevancy-0.1511119 %85 %
90Number of DoFollow External Links   Authority-0.15701376 %84 %
91Number of External Links   Authority-0.15811477 %85 %
92Variations in H3 Tags   Relevancy-0.1596333 %83 %
93Number of Includes   Technology-0.14492782 %75 %
94Exact Matches in Top 30KB   Relevancy-0.1429218 %78 %
95Number of Sentences   Size-0.14102812783 %83 %
96Has JSON-LD Schema Markup   Relevancy-0.141155 %73 %
97Flesch Kincaid Reading Grade Level   Other-0.147293 %87 %
98Number of H3 Tags   Size-0.1438860 %83 %
99Variations making whole H1-H6 Tags   Relevancy-0.142117 %78 %
100Has Entities in H2 Tags   Relevancy-0.141154 %85 %
101Variations in Footer Tags   Relevancy-0.1439751236 %82 %
102Number of Facebook Pages   Authority-0.149260 %79 %
103Leading Variations in H2 Tags   Relevancy-0.148122 %82 %
104Exact Matches in Sentences   Relevancy-0.1442321 %86 %
105Number of Images without ALT Text   Size-0.141061059 %81 %
106Number Of JSON-LD Types   Relevancy-0.141461457 %79 %
107Average Words Per Sentence   Size-0.141663180 %80 %
108Has Privacy Policy   Trust-0.141158 %74 %
109Variations making whole H1, H2, and H3 Tags   Relevancy-0.141116 %78 %
110Has Meta Charset   Technology-0.141176 %83 %
111Number of CSS Includes   Technology-0.14201074 %75 %
112Variations in TITLE Attributes   Relevancy-0.14345637 %81 %
113Variations in Section Tags   Relevancy-0.1415601737 %83 %
114Search Result Host Length   Size-0.13261785 %78 %
115Search Result Domain Length   Size-0.13261785 %78 %
116Exact Matches in Title Tag   Relevancy-0.132117 %84 %
117Number of Absolute URLs   Authority-0.13114928384 %79 %
118Search Result Uses HTTPS   Other-0.131185 %84 %
119Number of Questions In Headings   Size-0.139237 %81 %
120LSI Words in H3 Tags   Relevancy-0.13942050 %90 %
121Has Form   Technology-0.131155 %77 %
122Has Canonical URL   Authority-0.131172 %79 %
123Has Meta Viewport   Technology-0.131183 %82 %
124Page Size Kilobytes   Size-0.13120830684 %77 %
125Variations making whole H1 Tags   Relevancy-0.131110 %77 %
126Variations Making Whole Span Tags   Relevancy-0.134120 %82 %
127Variations in Strong Tags   Relevancy-0.1395226 %82 %
128Title Length   Size-0.131085184 %79 %
129Meta Description Tag Has Entities   Relevancy-0.131158 %80 %
130Entities in H4 Tags-0.1310222 %86 %
131Number of Questions   Size-0.131431169 %81 %
132Has Meta Description   Relevancy-0.131167 %78 %
133Title Word Count   Size-0.1315883 %78 %
134Is Store Page   Other-0.131149 %70 %
135Number of Instagram Pages   Authority-0.1316248 %77 %
136Variations making whole A Tags   Relevancy-0.13111228 %74 %
137Number of Questions In H2 Tags   Size-0.134123 %77 %
138Has Entities in H3 Tags   Relevancy-0.131146 %82 %
139Variations Making Whole LI Tags   Relevancy-0.136124 %76 %
140Inline CSS Kilobytes   Size-0.132276166 %73 %
141Number of Prices   Size-0.1317937068 %80 %
142Number of JavaScript Includes   Technology-0.13381882 %75 %
143Meta Description Length   Size-0.1366012267 %78 %
144Has FavIcon   Technology-0.131177 %81 %
145Number of H4 Tags   Size-0.1320438 %79 %
146Uses JSON-LD name   Other-0.131154 %72 %
147Uses Schema name   Other-0.131162 %68 %
148Percentage of DoFollow External Links   Authority-0.12321175 %76 %
149Word Count in Meta Description   Size-0.12481967 %78 %
150Has Schema Markup   Relevancy-0.121165 %73 %
151Exact Matches in H1 Tags   Relevancy-0.122113 %84 %
152Has Contact Page   Trust-0.121164 %72 %
153Number of Social Pages   Authority-0.1217466 %79 %
154Headings Has Question   Other-0.121136 %76 %
155Uses Schema sku   Other-0.12116 %32 %
156Number of Social Accounts   Authority-0.1215242 %79 %
157Is Purchase Page   Other-0.121143 %66 %
158Variations in I Tags   Relevancy-0.12299425 %79 %
159Inline JavaScript Kilobytes   Size-0.1270810681 %75 %
160Number of Facebook Accounts   Authority-0.128129 %77 %
161Variations in the last 100 words   Relevancy-0.12195346 %80 %
162Uses Schema image   Other-0.121123 %64 %
163Is Home Page   Other-0.121120 %40 %
164Number of LinkedIn Pages   Authority-0.1214129 %74 %
165Uses Schema itemreviewed   Other-0.12112 %18 %
166Number of Email Addresses   Trust-0.1274545 %80 %
167Variations in Button Tags   Relevancy-0.12427068 %78 %
168Number of Nofollow Links   Authority-0.1223426 %76 %
169Has OpenGraph Type   Relevancy-0.121162 %71 %
170Uses Schema aggregaterating   Other-0.121111 %59 %
171Uses JSON-LD BreadcrumbList   Other-0.121136 %65 %
172Uses JSON-LD ListItem   Other-0.121136 %67 %
173Uses JSON-LD description   Other-0.121143 %65 %
174Uses JSON-LD sku   Other-0.12115 %35 %
175Uses JSON-LD image   Other-0.121117 %70 %
176Number of HREF Lang Tags   Size-0.1244212 %73 %
177Search Result URL Length   Size-0.121056397 %58 %
178Number of US Phone Numbers   Trust-0.116701237 %78 %
179Variations in Meta Twitter Content   Relevancy-0.114124 %68 %
180Has OpenGraph Image   Relevancy-0.111153 %69 %
181Variations in Meta Twitter Description   Relevancy-0.1130122 %72 %
182Uses Schema pricecurrency   Other-0.11118 %49 %
183Number of Questions In H3 Tags   Size-0.116117 %77 %
184Leading Variations in H3 Tags   Relevancy-0.1110115 %78 %
185Uses Schema availability   Other-0.11117 %47 %
186Has Terms of Service   Trust-0.111134 %64 %
187Uses Schema listitem   Other-0.111144 %62 %
188Variations in Article Tags   Relevancy-0.116171122 %72 %
189Uses Schema breadcrumblist   Other-0.111143 %62 %
190Uses JSON-LD url   Other-0.111146 %73 %
191LSI Words in H4 Tags   Relevancy-0.1165730 %85 %
192Variations in H4-H6 Tags   Relevancy-0.1132116 %76 %
193Has HREF Lang   Technology-0.111113 %68 %
194Exact Matches in H2 Tags   Relevancy-0.115111 %83 %
195Uses Schema url   Other-0.111157 %64 %
196Uses JSON-LD priceCurrency   Other-0.11118 %52 %
197Uses Schema product   Other-0.11119 %52 %
198Has Meta Twitter Card   Authority-0.111154 %62 %
199Uses JSON-LD itemCondition   Other-0.11114 %26 %
200Uses Schema organization   Other-0.111136 %63 %