Measures 147553 SEO Factors

145831 Built-In SEO Factors

136673 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-0.23100232285 %84 %
2Number of Unique Variations Used   Diversity-0.2224679 %88 %
3Number of Distinct Entities Used   Diversity-0.22633079 %95 %
4Number of Top 200 Shared Factors Used   Diversity-0.22534097 %94 %
5Entities in Title Tag   Relevancy-0.217371 %94 %
6Number of Top 100 Shared Factors Used   Diversity-0.21393097 %92 %
7Number of Top 50 Shared Factors Used   Diversity-0.21161396 %93 %
8Search Result Domain is .com, .net, or .org   Other-0.21115 %59 %
9Variations in Div Tags   Relevancy-0.25222315674 %89 %
10Variations in Body Tags   Relevancy-0.213377237778 %89 %
11Variations in HTML Tags   Relevancy-0.213377237578 %89 %
12Search Result Domain is .com   Other-0.2114 %58 %
13Entities in the HTML Tag   Relevancy-0.272313875 %95 %
14Entities in Sentences   Relevancy-0.263013572 %95 %
15Variations in H1-H6 Tags   Relevancy-0.19189663 %89 %
16Variations in H1, H2, and H3 Tags   Relevancy-0.19169663 %89 %
17Variations in Search Result Document File Name   Relevancy-0.199145 %78 %
18Variations in P Tags   Relevancy-0.1927543167 %90 %
19Variations in H1 and H2 Tags   Relevancy-0.1978460 %88 %
20Load Time Milliseconds   Performance-0.1923823133786 %88 %
21Entities in H1 Tags-0.197258 %92 %
22Variations in Sentences   Relevancy-0.19106104471 %88 %
23Number of Referring Domains   Authority-0.19242512046 %69 %
24Term Frequency   Relevancy-0.185378 %90 %
25Number of Factors Used   Diversity-0.1828117997 %88 %
26Variations in LI Tags   Relevancy-0.1828912265 %88 %
27Variations in A Tags   Relevancy-0.1854832665 %85 %
28Number of Backlinks   Authority-0.18770312788846 %71 %
29Variations in Search Result Display URL   Relevancy-0.1815275 %81 %
30Variations in Search Result Link Text   Relevancy-0.1815275 %81 %
31LSI Words in Sentences   Relevancy-0.18271374171 %94 %
32Exact Matches in the HTML Tag   Relevancy-0.183491531 %85 %
33Entities in H2 Tags-0.1831653 %93 %
34Variations in H1 Tags   Relevancy-0.1812153 %87 %
35Number of Do Follow Backlinks   Authority-0.18715834716642 %70 %
36Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1718243 %87 %
37LSI Words in Title Tag   Relevancy-0.1714672 %94 %
38Variations in the Title Tag   Relevancy-0.1716263 %86 %
39Leading Variations in H1-H6 Tags   Relevancy-0.1720245 %88 %
40Variations in Search Result URL Path   Relevancy-0.179145 %85 %
41Number of Images   Size-0.171552978 %87 %
42Number of No Follow Backlinks   Authority-0.175447885435 %66 %
43Number of HTML Tags   Size-0.173192113886 %86 %
44Variations in Meta Description   Relevancy-0.1743252 %84 %
45Clean Keyword Density in the HTML Tag   Relevancy-0.17150469 %79 %
46Variation Count in Top 30KB   Relevancy-0.1759573266 %86 %
47Word Count   Size-0.174259135185 %86 %
48Number of Images with ALT Text   Size-0.171052073 %88 %
49Entities in Meta Description Tag   Relevancy-0.1711359 %89 %
50Unabridged Word Count   Size-0.176247170985 %87 %
51Variations in H2 Tags   Relevancy-0.1668343 %85 %
52Variations in Span Tags   Relevancy-0.161081950 %86 %
53Number of P Tags   Size-0.161223677 %88 %
54Clean Text Kilobytes   Size-0.161121278 %87 %
55Variations in A Tag HREF Attributes   Relevancy-0.1638014458 %88 %
56Variations in the Canonical URL   Relevancy-0.1648248 %84 %
57Entities in H3 Tags-0.1627644 %92 %
58LSI Words in H1 Tags   Relevancy-0.1614461 %92 %
59Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182758 %89 %
60Has Entities in H1 Tags   Relevancy-0.161159 %88 %
61Variations in ALT Attributes   Relevancy-0.16410644 %84 %
62Variations in Search Result URL   Relevancy-0.1622151 %80 %
63Leading Variations in H1 Tags   Relevancy-0.162129 %81 %
64Exact Matches in H1-H6 Tags   Relevancy-0.1611121 %84 %
65TF/IDF   Relevancy-0.161156 %86 %
66Variations in Nav Tags   Relevancy-0.16131854247 %84 %
67Number of Heading Tags   Size-0.16532178 %87 %
68Number of HTTPS Links   Authority-0.1655116082 %86 %
69Number of Forms   Technology-0.1614357 %81 %
70Number of Links   Authority-0.1655216182 %86 %
71Number of DoFollow Links   Authority-0.1654615782 %86 %
72Number of Internal Links   Authority-0.1654414782 %86 %
73Variation Density in Top 30KB   Relevancy-0.16296360 %80 %
74Variations in First 100 Words   Relevancy-0.16152663 %83 %
75Leading Variations in Title Tag   Relevancy-0.161131 %80 %
76Uses Microdata WPAdBlock   Other-0.16111 %14 %
77Uses Schema wpadblock   Other-0.16111 %14 %
78Variations in Main Tags   Relevancy-0.16254398637 %88 %
79Percentage of DoFollow Links   Authority-0.151008582 %91 %
80Percentage of DoFollow Internal Links   Authority-0.15937681 %86 %
81Exact Matches in Top 30KB   Relevancy-0.1529219 %77 %
82Variations in Script Tags   Relevancy-0.154881515462 %85 %
83Variations in Absolute URLs   Relevancy-0.1588476859 %87 %
84Title Tag Has Entities   Relevancy-0.151171 %88 %
85Number of H1 Tags   Size-0.154272 %87 %
86LSI Words in Meta Description Tag   Relevancy-0.15421159 %91 %
87Search Result Number of Dirs in Path   Other-0.154274 %74 %
88Exact Matches in Sentences   Relevancy-0.1542323 %84 %
89Number of HTML Comments   Size-0.159814574 %85 %
90Uses JSON-LD itemReviewed-0.15112 %13 %
91Number of DoFollow External Links   Authority-0.15551377 %85 %
92Variations in OpenGraph Title   Relevancy-0.1511151 %79 %
93Variations in OpenGraph Description   Relevancy-0.1597246 %80 %
94Number of External Links   Authority-0.15731478 %85 %
95Exact Matches in Title Tag   Relevancy-0.152119 %83 %
96Number of H2 Tags   Size-0.1518768 %85 %
97LSI Words in H2 Tags   Relevancy-0.15801958 %92 %
98Variations making whole H1-H6 Tags   Relevancy-0.142118 %79 %
99Variations in H3 Tags   Relevancy-0.1496332 %83 %
100Variations in Footer Tags   Relevancy-0.1439751435 %81 %
101Flesch Kincaid Reading Grade Level   Other-0.147292 %87 %
102Variations making whole H1, H2, and H3 Tags   Relevancy-0.141117 %79 %
103Number of Sentences   Size-0.1462212184 %83 %
104Variations in TITLE Attributes   Relevancy-0.14345638 %81 %
105Has Privacy Policy   Trust-0.141158 %72 %
106Exact Matches in H1 Tags   Relevancy-0.142114 %83 %
107Leading Variations in H2 Tags   Relevancy-0.148121 %83 %
108Has Entities in H2 Tags   Relevancy-0.141153 %84 %
109Number of Images without ALT Text   Size-0.14641059 %79 %
110Number of H3 Tags   Size-0.1426860 %83 %
111Average Words Per Sentence   Size-0.141663280 %81 %
112Variations in Section Tags   Relevancy-0.1415601735 %82 %
113Has Meta Charset   Technology-0.141177 %84 %
114Has Form   Technology-0.141155 %78 %
115Is Store Page   Other-0.131152 %70 %
116Entities in H4 Tags-0.1310222 %85 %
117Number of Questions In Headings   Size-0.138234 %79 %
118Variations Making Whole Span Tags   Relevancy-0.134121 %82 %
119Search Result Uses HTTPS   Other-0.131185 %83 %
120Meta Description Tag Has Entities   Relevancy-0.131159 %80 %
121Variations making whole H1 Tags   Relevancy-0.131111 %78 %
122Number of Facebook Pages   Authority-0.139261 %77 %
123Has Canonical URL   Authority-0.131172 %78 %
124Number of Absolute URLs   Authority-0.13114928484 %79 %
125Number Of JSON-LD Types   Relevancy-0.131461356 %75 %
126Number of Includes   Technology-0.13492783 %72 %
127Page Size Kilobytes   Size-0.1384831085 %76 %
128Has Meta Viewport   Technology-0.131183 %82 %
129Variations in Strong Tags   Relevancy-0.1395224 %81 %
130Search Result Domain Length   Size-0.13261785 %77 %
131Search Result Host Length   Size-0.13261785 %77 %
132LSI Words in H3 Tags   Relevancy-0.13941950 %89 %
133Variations Making Whole LI Tags   Relevancy-0.136124 %77 %
134Title Word Count   Size-0.1314884 %78 %
135Number of Prices   Size-0.133876569 %81 %
136Is Home Page   Other-0.131120 %41 %
137Has Meta Description   Relevancy-0.131167 %79 %
138Has FavIcon   Technology-0.131177 %81 %
139Has Entities in H3 Tags   Relevancy-0.131145 %80 %
140Number of H4 Tags   Size-0.1316437 %80 %
141Title Length   Size-0.13935084 %79 %
142Has JSON-LD Schema Markup   Relevancy-0.131154 %70 %
143Number of Questions   Size-0.13821169 %80 %
144Variations making whole A Tags   Relevancy-0.13111228 %73 %
145Percentage of DoFollow External Links   Authority-0.13321175 %77 %
146Uses Schema image   Other-0.131122 %67 %
147Is Purchase Page   Other-0.131144 %67 %
148Uses Schema sku   Other-0.13117 %38 %
149Number of Questions In H2 Tags   Size-0.124121 %78 %
150Exact Matches in H2 Tags   Relevancy-0.125112 %82 %
151Uses Schema name   Other-0.121161 %69 %
152Meta Description Length   Size-0.1230912267 %78 %
153Headings Has Question   Other-0.121134 %74 %
154Number of JavaScript Includes   Technology-0.12381782 %73 %
155Uses Schema itemreviewed   Other-0.12113 %21 %
156Uses JSON-LD sku   Other-0.12116 %38 %
157Word Count in Meta Description   Size-0.12482067 %79 %
158Has Schema Markup   Relevancy-0.121165 %72 %
159Number of CSS Includes   Technology-0.12201076 %74 %
160Has Contact Page   Trust-0.121163 %70 %
161Number of Social Pages   Authority-0.1217466 %78 %
162Uses Schema aggregaterating   Other-0.121110 %63 %
163Inline JavaScript Kilobytes   Size-0.1244710882 %75 %
164Number of Instagram Pages   Authority-0.1216249 %76 %
165Number of Social Accounts   Authority-0.1215242 %78 %
166Inline CSS Kilobytes   Size-0.122275965 %70 %
167Uses JSON-LD name   Other-0.121153 %69 %
168Variations in Button Tags   Relevancy-0.12427088 %81 %
169Exact Matches in Meta Description   Relevancy-0.122112 %83 %
170Has Meta Robots   Other-0.121128 %69 %
171Uses JSON-LD image   Other-0.121117 %71 %
172Number of Email Addresses   Trust-0.1272545 %81 %
173Uses Schema availability   Other-0.12118 %49 %
174Search Result URL Length   Size-0.121036197 %55 %
175Number of Facebook Accounts   Authority-0.128129 %75 %
176Variations in I Tags   Relevancy-0.12299425 %78 %
177Uses Schema pricecurrency   Other-0.12119 %52 %
178LSI Words in H4 Tags   Relevancy-0.1265730 %85 %
179Uses Microdata sku   Other-0.12113 %14 %
180Variations in H4-H6 Tags   Relevancy-0.1232116 %76 %
181Variations in the last 100 words   Relevancy-0.12195345 %79 %
182Variations in Meta Twitter Description   Relevancy-0.1230121 %69 %
183Number of Nofollow Links   Authority-0.1223526 %77 %
184Number of LinkedIn Pages   Authority-0.1214127 %71 %
185Uses JSON-LD itemCondition   Other-0.11114 %29 %
186Uses Schema ratingvalue   Other-0.11119 %62 %
187Has OpenGraph Type   Relevancy-0.111161 %70 %
188Search Result Summary Length   Size-0.1121715297 %64 %
189Uses Schema gtin13   Other-0.11113 %14 %
190Uses Schema product   Other-0.111110 %56 %
191Has Terms of Service   Trust-0.111132 %61 %
192Uses Schema offer   Other-0.11119 %59 %
193Is Pagination Page   Other-0.111118 %62 %
194Has HREF Lang   Technology-0.111113 %68 %
195Variations in Article Tags   Relevancy-0.116171122 %70 %
196Uses JSON-LD BreadcrumbList   Other-0.111135 %63 %
197Variations in Meta Twitter Content   Relevancy-0.114123 %65 %
198Uses JSON-LD ListItem   Other-0.111135 %65 %
199Uses Schema price   Other-0.11118 %49 %
200Number of HREF Lang Tags   Size-0.1144212 %73 %