Measures 147529 SEO Factors

145807 Built-In SEO Factors

136649 On-page SEO Factors

9158 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-0.23100232485 %83 %
2Number of Unique Variations Used   Diversity-0.2224679 %88 %
3Number of Distinct Entities Used   Diversity-0.22633080 %95 %
4Entities in Title Tag   Relevancy-0.227371 %94 %
5Number of Top 200 Shared Factors Used   Diversity-0.22534097 %94 %
6Number of Top 100 Shared Factors Used   Diversity-0.22393097 %93 %
7Search Result Domain is .com, .net, or .org   Other-0.21115 %59 %
8Number of Top 50 Shared Factors Used   Diversity-0.21161396 %93 %
9Variations in Div Tags   Relevancy-0.25222316174 %89 %
10Variations in Body Tags   Relevancy-0.213377239078 %89 %
11Search Result Domain is .com   Other-0.2114 %58 %
12Variations in HTML Tags   Relevancy-0.213377238878 %90 %
13Variations in Search Result Document File Name   Relevancy-0.29146 %77 %
14Variations in H1-H6 Tags   Relevancy-0.2189664 %89 %
15Entities in the HTML Tag   Relevancy-0.272313975 %95 %
16Entities in Sentences   Relevancy-0.263013572 %95 %
17Variations in H1, H2, and H3 Tags   Relevancy-0.19169563 %90 %
18Variations in H1 and H2 Tags   Relevancy-0.1973460 %88 %
19Variations in P Tags   Relevancy-0.1927543067 %90 %
20Entities in H1 Tags-0.197259 %92 %
21Load Time Milliseconds   Performance-0.1919474132186 %88 %
22Number of Referring Domains   Authority-0.19242511946 %69 %
23Variations in Sentences   Relevancy-0.19106104371 %88 %
24Term Frequency   Relevancy-0.195378 %90 %
25Number of Factors Used   Diversity-0.1928117897 %88 %
26Variations in LI Tags   Relevancy-0.1828912165 %88 %
27Variations in Search Result Display URL   Relevancy-0.1811275 %81 %
28Variations in Search Result Link Text   Relevancy-0.1811275 %81 %
29Exact Matches in the HTML Tag   Relevancy-0.183491531 %85 %
30Variations in A Tags   Relevancy-0.1854832665 %85 %
31Number of Backlinks   Authority-0.18770312809146 %70 %
32LSI Words in Sentences   Relevancy-0.18246274071 %94 %
33Variations in H1 Tags   Relevancy-0.187153 %88 %
34Number of Do Follow Backlinks   Authority-0.18715834739642 %69 %
35Variations in the Title Tag   Relevancy-0.1811264 %87 %
36Entities in H2 Tags-0.1831653 %93 %
37Variations in Search Result URL Path   Relevancy-0.189145 %85 %
38LSI Words in Title Tag   Relevancy-0.1714672 %94 %
39Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1718243 %87 %
40Leading Variations in H1-H6 Tags   Relevancy-0.1720245 %89 %
41Number of Images   Size-0.171552979 %87 %
42Number of No Follow Backlinks   Authority-0.175447886035 %66 %
43Clean Keyword Density in the HTML Tag   Relevancy-0.17150469 %79 %
44Variations in Meta Description   Relevancy-0.1743252 %85 %
45Number of HTML Tags   Size-0.173192114286 %86 %
46Variation Count in Top 30KB   Relevancy-0.1744212766 %86 %
47Entities in Meta Description Tag   Relevancy-0.1711359 %90 %
48Number of Images with ALT Text   Size-0.171052074 %89 %
49Word Count   Size-0.174259135585 %86 %
50Variations in H2 Tags   Relevancy-0.1768343 %85 %
51Variations in Span Tags   Relevancy-0.161081951 %87 %
52Variations in the Canonical URL   Relevancy-0.1648249 %84 %
53Unabridged Word Count   Size-0.166247171485 %87 %
54Variations in A Tag HREF Attributes   Relevancy-0.1638014458 %88 %
55Variations in ALT Attributes   Relevancy-0.16410644 %84 %
56Variations in Search Result URL   Relevancy-0.1622152 %80 %
57Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182759 %89 %
58Clean Text Kilobytes   Size-0.161121278 %87 %
59Number of P Tags   Size-0.161223677 %89 %
60LSI Words in H1 Tags   Relevancy-0.1614461 %92 %
61TF/IDF   Relevancy-0.161156 %86 %
62Entities in H3 Tags-0.1623644 %92 %
63Variations in Nav Tags   Relevancy-0.16131853947 %84 %
64Has Entities in H1 Tags   Relevancy-0.161159 %89 %
65Exact Matches in H1-H6 Tags   Relevancy-0.169121 %84 %
66Leading Variations in H1 Tags   Relevancy-0.161129 %81 %
67Number of Forms   Technology-0.1614357 %81 %
68Number of Heading Tags   Size-0.16532178 %87 %
69Leading Variations in Title Tag   Relevancy-0.161132 %80 %
70Variations in First 100 Words   Relevancy-0.16152663 %83 %
71Number of HTTPS Links   Authority-0.1646316082 %87 %
72Variation Density in Top 30KB   Relevancy-0.16247259 %80 %
73Variations in Main Tags   Relevancy-0.16254397937 %88 %
74Number of Links   Authority-0.1646416182 %87 %
75Number of DoFollow Links   Authority-0.1645015782 %87 %
76Number of Internal Links   Authority-0.1643514782 %87 %
77Exact Matches in Top 30KB   Relevancy-0.1629220 %77 %
78Uses Microdata WPAdBlock   Other-0.15111 %14 %
79Uses Schema wpadblock   Other-0.15111 %14 %
80Percentage of DoFollow Internal Links   Authority-0.15937681 %86 %
81Percentage of DoFollow Links   Authority-0.151008582 %91 %
82Variations in Script Tags   Relevancy-0.154881514661 %85 %
83Variations in Absolute URLs   Relevancy-0.1588476659 %86 %
84Title Tag Has Entities   Relevancy-0.151171 %88 %
85Exact Matches in Title Tag   Relevancy-0.152119 %83 %
86LSI Words in Meta Description Tag   Relevancy-0.15421159 %92 %
87Search Result Number of Dirs in Path   Other-0.153274 %73 %
88Exact Matches in Sentences   Relevancy-0.1542323 %84 %
89Number of H1 Tags   Size-0.154273 %87 %
90Number of DoFollow External Links   Authority-0.15551377 %85 %
91Variations in OpenGraph Title   Relevancy-0.159151 %79 %
92Number of External Links   Authority-0.15731478 %85 %
93Number of HTML Comments   Size-0.159814675 %85 %
94Variations in OpenGraph Description   Relevancy-0.1597246 %79 %
95Uses JSON-LD itemReviewed-0.15112 %13 %
96Number of H2 Tags   Size-0.1518768 %85 %
97LSI Words in H2 Tags   Relevancy-0.14801958 %92 %
98Variations making whole H1-H6 Tags   Relevancy-0.142118 %79 %
99Variations in H3 Tags   Relevancy-0.1496232 %83 %
100Variations in Footer Tags   Relevancy-0.1439751135 %81 %
101Variations making whole H1, H2, and H3 Tags   Relevancy-0.141117 %78 %
102Has Privacy Policy   Trust-0.141158 %72 %
103Flesch Kincaid Reading Grade Level   Other-0.147292 %87 %
104Exact Matches in H1 Tags   Relevancy-0.142115 %83 %
105Variations in TITLE Attributes   Relevancy-0.14345638 %81 %
106Number of Sentences   Size-0.1462212184 %83 %
107Leading Variations in H2 Tags   Relevancy-0.148121 %82 %
108Has Form   Technology-0.141155 %78 %
109Number of H3 Tags   Size-0.1423860 %83 %
110Has Entities in H2 Tags   Relevancy-0.141153 %84 %
111Variations in Section Tags   Relevancy-0.1415601735 %82 %
112Number of Images without ALT Text   Size-0.14641059 %79 %
113Is Store Page   Other-0.141153 %70 %
114Entities in H4 Tags-0.1310222 %85 %
115Meta Description Tag Has Entities   Relevancy-0.131159 %81 %
116Average Words Per Sentence   Size-0.131663281 %82 %
117Has Meta Charset   Technology-0.131177 %84 %
118Number of Questions In Headings   Size-0.138235 %79 %
119Variations Making Whole Span Tags   Relevancy-0.134121 %82 %
120Variations making whole H1 Tags   Relevancy-0.131111 %78 %
121Number of Facebook Pages   Authority-0.139262 %77 %
122Search Result Uses HTTPS   Other-0.131185 %83 %
123Number of Includes   Technology-0.13482783 %72 %
124Has Canonical URL   Authority-0.131173 %78 %
125Variations in Strong Tags   Relevancy-0.1395224 %81 %
126Number of Absolute URLs   Authority-0.13114928184 %79 %
127Has Meta Viewport   Technology-0.131183 %82 %
128Number Of JSON-LD Types   Relevancy-0.131461356 %75 %
129Page Size Kilobytes   Size-0.1384830885 %76 %
130Has FavIcon   Technology-0.131177 %81 %
131Has Meta Description   Relevancy-0.131167 %80 %
132Title Word Count   Size-0.1314884 %78 %
133Title Length   Size-0.13935084 %79 %
134Variations Making Whole LI Tags   Relevancy-0.136124 %78 %
135Is Home Page   Other-0.131120 %41 %
136Percentage of DoFollow External Links   Authority-0.13321176 %77 %
137Number of Prices   Size-0.133876569 %81 %
138LSI Words in H3 Tags   Relevancy-0.13781950 %89 %
139Search Result Domain Length   Size-0.13261785 %77 %
140Search Result Host Length   Size-0.13261785 %77 %
141Has JSON-LD Schema Markup   Relevancy-0.131154 %69 %
142Uses Schema image   Other-0.131122 %68 %
143Number of H4 Tags   Size-0.1316438 %79 %
144Variations making whole A Tags   Relevancy-0.13111228 %73 %
145Has Entities in H3 Tags   Relevancy-0.131145 %80 %
146Is Purchase Page   Other-0.131144 %68 %
147Number of Questions In H2 Tags   Size-0.134121 %77 %
148Meta Description Length   Size-0.1330912368 %79 %
149Number of Questions   Size-0.12821169 %80 %
150Uses Schema sku   Other-0.12117 %40 %
151Exact Matches in H2 Tags   Relevancy-0.125112 %82 %
152Uses Schema name   Other-0.121161 %69 %
153Number of JavaScript Includes   Technology-0.12381882 %73 %
154Number of CSS Includes   Technology-0.12201076 %73 %
155Word Count in Meta Description   Size-0.12482068 %79 %
156Uses Schema itemreviewed   Other-0.12113 %21 %
157Headings Has Question   Other-0.121134 %74 %
158Number of Social Pages   Authority-0.1216466 %78 %
159Has Contact Page   Trust-0.121163 %70 %
160Has Schema Markup   Relevancy-0.121165 %72 %
161Number of Instagram Pages   Authority-0.1216250 %76 %
162Uses JSON-LD sku   Other-0.12116 %39 %
163Uses Schema aggregaterating   Other-0.121110 %63 %
164Number of Social Accounts   Authority-0.128243 %78 %
165Exact Matches in Meta Description   Relevancy-0.122112 %83 %
166Uses JSON-LD name   Other-0.121153 %69 %
167Number of Email Addresses   Trust-0.1272545 %81 %
168Inline JavaScript Kilobytes   Size-0.1244710682 %75 %
169Uses Schema pricecurrency   Other-0.121110 %51 %
170Variations in I Tags   Relevancy-0.1293424 %77 %
171Has Meta Robots   Other-0.121128 %69 %
172Uses JSON-LD image   Other-0.121117 %71 %
173Number of Facebook Accounts   Authority-0.128129 %75 %
174Number of LinkedIn Pages   Authority-0.128127 %71 %
175Search Result URL Length   Size-0.121036197 %56 %
176Uses Schema availability   Other-0.12118 %48 %
177Inline CSS Kilobytes   Size-0.122275965 %69 %
178Variations in the last 100 words   Relevancy-0.12144345 %79 %
179Variations in Button Tags   Relevancy-0.12427078 %82 %
180Variations in H4-H6 Tags   Relevancy-0.1221116 %76 %
181Number of Nofollow Links   Authority-0.1223526 %77 %
182Uses Microdata sku   Other-0.12113 %14 %
183Uses Schema applicationcategory   Other-0.12115 %11 %
184LSI Words in H4 Tags   Relevancy-0.1265730 %84 %
185Uses Schema product   Other-0.121110 %56 %
186Uses Schema ratingvalue   Other-0.12119 %61 %
187Uses JSON-LD itemCondition   Other-0.12114 %30 %
188Uses Schema gtin13   Other-0.12113 %14 %
189Has Terms of Service   Trust-0.121132 %60 %
190Variations in Meta Twitter Description   Relevancy-0.1130121 %69 %
191Search Result Summary Length   Size-0.1121715297 %64 %
192Has OpenGraph Type   Relevancy-0.111162 %69 %
193Uses Schema offer   Other-0.111110 %58 %
194Number of US Phone Numbers   Trust-0.116701336 %76 %
195Has HREF Lang   Technology-0.111114 %68 %
196Is Pagination Page   Other-0.111118 %62 %
197Variations in Article Tags   Relevancy-0.116171022 %70 %
198Uses Schema itemcondition   Other-0.11114 %30 %
199Uses Schema operatingsystem   Other-0.11114 %11 %
200Leading Variations in H3 Tags   Relevancy-0.1110115 %77 %