Measures 146559 SEO Factors

144837 Built-In SEO Factors

135715 On-page SEO Factors

9122 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 2025-11     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-0.24102033981 %79 %
2Number of Top 200 Shared Factors Used   Diversity-0.22523898 %94 %
3Number of Top 100 Shared Factors Used   Diversity-0.22392998 %94 %
4Number of Unique Variations Used   Diversity-0.2229777 %89 %
5Number of Distinct Entities Used   Diversity-0.221062977 %95 %
6Entities in Title Tag   Relevancy-0.227366 %94 %
7Load Time Milliseconds   Performance-0.2132075152283 %91 %
8Number of Top 50 Shared Factors Used   Diversity-0.21171298 %94 %
9Search Result Domain is .com, .net, or .org   Other-0.21115 %76 %
10Entities in Sentences   Relevancy-0.266915169 %95 %
11Entities in the HTML Tag   Relevancy-0.274615472 %96 %
12Variations in H1-H6 Tags   Relevancy-0.222863 %88 %
13Variations in H1, H2, and H3 Tags   Relevancy-0.221762 %87 %
14Variations in Div Tags   Relevancy-0.262511172 %92 %
15Search Result Domain is .com   Other-0.2115 %76 %
16Variations in H1 and H2 Tags   Relevancy-0.211460 %87 %
17Variations in Body Tags   Relevancy-0.2179922776 %91 %
18Variations in P Tags   Relevancy-0.21313164 %90 %
19Variations in HTML Tags   Relevancy-0.2179922475 %92 %
20Entities in H1 Tags-0.196255 %91 %
21Variations in Search Result Document File Name   Relevancy-0.193143 %82 %
22Number of Referring Domains   Authority-0.19170812652 %65 %
23Number of Factors Used   Diversity-0.1933917898 %90 %
24Variations in LI Tags   Relevancy-0.191722263 %90 %
25Term Frequency   Relevancy-0.194375 %89 %
26Variations in A Tags   Relevancy-0.191402364 %86 %
27Variations in Sentences   Relevancy-0.191653370 %88 %
28Entities in H2 Tags-0.1930751 %92 %
29Variations in the Title Tag   Relevancy-0.193263 %86 %
30Variations in Search Result URL Path   Relevancy-0.193144 %84 %
31Variation Count in Top 30KB   Relevancy-0.19771863 %86 %
32Number of Backlinks   Authority-0.18124727681152 %67 %
33Leading Variations in H1-H6 Tags   Relevancy-0.1814244 %87 %
34Clean Keyword Density in the HTML Tag   Relevancy-0.187367 %81 %
35Unabridged Word Count   Size-0.184437187083 %90 %
36Clean Text Kilobytes   Size-0.18311375 %90 %
37Word Count   Size-0.183797147783 %90 %
38Variations in Search Result Link Text   Relevancy-0.183280 %83 %
39Variations in Search Result Display URL   Relevancy-0.183280 %83 %
40Number of HTML Tags   Size-0.183693112183 %89 %
41Number of Images   Size-0.183063575 %90 %
42Variations in the Canonical URL   Relevancy-0.187247 %86 %
43Variations in First 100 Words   Relevancy-0.1817562 %86 %
44Number of Do Follow Backlinks   Authority-0.18122239606047 %66 %
45LSI Words in Sentences   Relevancy-0.18370378663 %95 %
46Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1811242 %88 %
47Number of Includes   Technology-0.18552679 %82 %
48Variations in H1 Tags   Relevancy-0.183153 %87 %
49Number of Images with ALT Text   Size-0.182792471 %87 %
50Variations in H2 Tags   Relevancy-0.1811345 %85 %
51Number of Heading Tags   Size-0.18672374 %86 %
52Variations in A Tag HREF Attributes   Relevancy-0.173233958 %92 %
53Search Result Number of Dirs in Path   Other-0.174271 %79 %
54Has Entities in H1 Tags   Relevancy-0.171155 %88 %
55Variations in Distinct A Tag HREF Attributes   Relevancy-0.172442358 %91 %
56Variations in Meta Description   Relevancy-0.174253 %85 %
57Variation Density in Top 30KB   Relevancy-0.177258 %82 %
58Entities in H3 Tags-0.1743844 %93 %
59Number of P Tags   Size-0.171354074 %90 %
60Variations in ALT Attributes   Relevancy-0.1755843 %85 %
61TF/IDF   Relevancy-0.171156 %87 %
62Entities in Meta Description Tag   Relevancy-0.178357 %90 %
63Variations in Span Tags   Relevancy-0.1741950 %89 %
64Number of Forms   Technology-0.1719354 %84 %
65Number of HTTPS Links   Authority-0.1741915379 %88 %
66Variations in Absolute URLs   Relevancy-0.173105159 %90 %
67Number of Links   Authority-0.1742215479 %87 %
68Number of DoFollow Links   Authority-0.1740914979 %88 %
69Variations in Search Result URL   Relevancy-0.174254 %79 %
70Title Tag Has Entities   Relevancy-0.171166 %88 %
71Number of Internal Links   Authority-0.1738913979 %88 %
72Variations in OpenGraph Description   Relevancy-0.174249 %82 %
73Number of H1 Tags   Size-0.1711269 %88 %
74Variations in Main Tags   Relevancy-0.174846336 %87 %
75Exact Matches in the HTML Tag   Relevancy-0.168261327 %82 %
76Leading Variations in Title Tag   Relevancy-0.161130 %82 %
77Variations in OpenGraph Title   Relevancy-0.163153 %80 %
78Number of CSS Includes   Technology-0.16221072 %79 %
79Has Form   Technology-0.161153 %79 %
80Number of No Follow Backlinks   Authority-0.161967376440 %65 %
81Percentage of DoFollow Links   Authority-0.16988179 %87 %
82Number of External Links   Authority-0.16671576 %86 %
83Percentage of DoFollow Internal Links   Authority-0.16907178 %85 %
84Variations in Script Tags   Relevancy-0.168537161 %83 %
85Number of Images without ALT Text   Size-0.16601157 %87 %
86Number of HTML Comments   Size-0.167076270 %84 %
87Average Words Per Sentence   Size-0.162293276 %83 %
88Number of Facebook Pages   Authority-0.166257 %82 %
89Number of DoFollow External Links   Authority-0.16641475 %86 %
90Number of H2 Tags   Size-0.1616767 %86 %
91Leading Variations in H1 Tags   Relevancy-0.161126 %82 %
92LSI Words in H1 Tags   Relevancy-0.1617455 %93 %
93Has Entities in H2 Tags   Relevancy-0.161152 %85 %
94LSI Words in Title Tag   Relevancy-0.1616564 %94 %
95Number of JavaScript Includes   Technology-0.16441880 %82 %
96Number of Sentences   Size-0.1658813281 %84 %
97Has Meta Charset   Technology-0.161173 %84 %
98Has JSON-LD Schema Markup   Relevancy-0.151153 %79 %
99Flesch Kincaid Reading Grade Level   Other-0.156194 %87 %
100Number of H3 Tags   Size-0.15331060 %85 %
101Variations in Nav Tags   Relevancy-0.152372445 %85 %
102Search Result Host Length   Size-0.15251682 %80 %
103Search Result Domain Length   Size-0.15251682 %80 %
104Variations in H3 Tags   Relevancy-0.1516335 %85 %
105Exact Matches in H1-H6 Tags   Relevancy-0.1511117 %83 %
106LSI Words in H2 Tags   Relevancy-0.15832052 %92 %
107LSI Words in Meta Description Tag   Relevancy-0.15361053 %91 %
108Inline CSS Kilobytes   Size-0.151916064 %84 %
109Variations in Footer Tags   Relevancy-0.1557633 %83 %
110Variations in Section Tags   Relevancy-0.15911735 %84 %
111Number of Questions In Headings   Size-0.148236 %82 %
112Leading Variations in H2 Tags   Relevancy-0.146121 %82 %
113Has Meta Viewport   Technology-0.141180 %84 %
114Has Canonical URL   Authority-0.141170 %80 %
115Number of Prices   Size-0.1429627669 %82 %
116Number of Questions   Size-0.14811266 %77 %
117Page Size Kilobytes   Size-0.14110532582 %78 %
118Search Result Uses HTTPS   Other-0.141182 %85 %
119Number Of JSON-LD Types   Relevancy-0.141181456 %83 %
120Number of Absolute URLs   Authority-0.1499029482 %82 %
121Variations making whole H1-H6 Tags   Relevancy-0.142116 %80 %
122Variations making whole H1, H2, and H3 Tags   Relevancy-0.142114 %81 %
123Entities in H4 Tags-0.1415221 %89 %
124Has Entities in H3 Tags   Relevancy-0.141145 %85 %
125Percentage of DoFollow External Links   Authority-0.14301073 %81 %
126Has Email   Trust-0.141142 %71 %
127Search Result URL Length   Size-0.14936298 %64 %
128Number of Email Addresses   Trust-0.14280542 %81 %
129Variations in the last 100 words   Relevancy-0.1413344 %81 %
130Meta Description Length   Size-0.1421711867 %79 %
131Word Count in Meta Description   Size-0.14381966 %78 %
132Number of Social Pages   Authority-0.1414463 %82 %
133Number of Nofollow Links   Authority-0.1444626 %77 %
134LSI Words in H3 Tags   Relevancy-0.141272446 %91 %
135Uses JSON-LD name   Other-0.141152 %78 %
136Variations in Meta Twitter Content   Relevancy-0.142125 %68 %
137Has FavIcon   Technology-0.141174 %78 %
138Variations Making Whole LI Tags   Relevancy-0.145124 %79 %
139Number of Instagram Pages   Authority-0.1412244 %79 %
140Variations in Meta Twitter Description   Relevancy-0.134124 %74 %
141Variations making whole A Tags   Relevancy-0.136128 %79 %
142Headings Has Question   Other-0.131136 %77 %
143Is Home Page   Other-0.131120 %42 %
144Has OpenGraph Type   Relevancy-0.131160 %72 %
145Has Privacy Policy   Trust-0.131159 %75 %
146Has Meta Description   Relevancy-0.131165 %74 %
147Number of LinkedIn Pages   Authority-0.135132 %78 %
148Title Length   Size-0.131225080 %78 %
149Is Store Page   Other-0.131146 %69 %
150Has Meta Twitter Card   Authority-0.131151 %65 %
151Variations in Strong Tags   Relevancy-0.1315325 %80 %
152Meta Description Tag Has Entities   Relevancy-0.131156 %83 %
153Title Word Count   Size-0.1318880 %77 %
154Variations in I Tags   Relevancy-0.1317322 %82 %
155Has OpenGraph Image   Relevancy-0.131154 %70 %
156Is Purchase Page   Other-0.131148 %67 %
157Has Schema Markup   Relevancy-0.131163 %76 %
158Uses JSON-LD CollectionPage   Other-0.13115 %35 %
159Number of Questions In H3 Tags   Size-0.135117 %77 %
160Inline JavaScript Kilobytes   Size-0.1358712079 %73 %
161Exact Matches in Top 30KB   Relevancy-0.1324215 %78 %
162Uses Schema collectionpage   Other-0.13115 %34 %
163Number of H4 Tags   Size-0.1320436 %83 %
164Exact Matches in Sentences   Relevancy-0.1342218 %82 %
165Number of Facebook Accounts   Authority-0.133128 %80 %
166Uses Schema name   Other-0.131160 %72 %
167Number of US Phone Numbers   Trust-0.136011240 %82 %
168Variations Making Whole Span Tags   Relevancy-0.135119 %81 %
169Has Meta Twitter Description   Authority-0.131130 %57 %
170Uses JSON-LD url   Other-0.131147 %77 %
171Has Contact Page   Trust-0.131161 %70 %
172Variations in TITLE Attributes   Relevancy-0.1387535 %80 %
173Has Terms of Service   Trust-0.131142 %68 %
174Number of Social Accounts   Authority-0.1310243 %80 %
175Variations making whole H1 Tags   Relevancy-0.12119 %80 %
176Variations in ID Attributes   Relevancy-0.1210213 %83 %
177Variations in H4-H6 Tags   Relevancy-0.1216117 %81 %
178Uses JSON-LD ListItem   Other-0.121133 %72 %
179Is Pagination Page   Other-0.121120 %67 %
180Has US Phone Number   Trust-0.121139 %72 %
181Percentage of NoFollow Links   Authority-0.1215323 %75 %
182Has Meta Twitter Title   Authority-0.121131 %57 %
183Uses Schema url   Other-0.121155 %70 %
184Variations in Button Tags   Relevancy-0.1238210 %83 %
185Exact Matches in Title Tag   Relevancy-0.122115 %79 %
186Number of NoFollow External Links   Authority-0.1221317 %76 %
187Leading Variations in H3 Tags   Relevancy-0.125116 %79 %
188Has Google Verify   Technology-0.121123 %65 %
189Percentage of NoFollow Internal Links   Authority-0.1213214 %71 %
190Uses JSON-LD ItemList   Other-0.12114 %46 %
191Uses Schema image   Other-0.121121 %72 %
192Uses Schema organization   Other-0.121134 %68 %
193Uses Schema itemlist   Other-0.12114 %47 %
194Has Entities in H4 Tags   Relevancy-0.121122 %80 %
195Number of Questions In H2 Tags   Size-0.124123 %74 %
196Is Category Page   Other-0.121116 %68 %
197Uses JSON-LD image   Other-0.121116 %70 %
198Uses Schema listitem   Other-0.121141 %66 %
199Variations in Value Attributes   Relevancy-0.1222111 %80 %
200Variations in H4 Tags   Relevancy-0.124113 %79 %