Measures 146594 SEO Factors

144872 Built-In SEO Factors

135737 On-page SEO Factors

9135 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-0.23134533882 %78 %
2Entities in Title Tag   Relevancy-0.227368 %95 %
3Number of Top 200 Shared Factors Used   Diversity-0.22523898 %93 %
4Number of Top 100 Shared Factors Used   Diversity-0.21392998 %93 %
5Number of Distinct Entities Used   Diversity-0.211062977 %96 %
6Load Time Milliseconds   Performance-0.2132075148084 %92 %
7Number of Unique Variations Used   Diversity-0.2129777 %89 %
8Number of Top 50 Shared Factors Used   Diversity-0.21171298 %93 %
9Search Result Domain is .com, .net, or .org   Other-0.21115 %76 %
10Search Result Domain is .com   Other-0.2115 %76 %
11Entities in Sentences   Relevancy-0.266915170 %95 %
12Entities in the HTML Tag   Relevancy-0.274615473 %96 %
13Variations in H1-H6 Tags   Relevancy-0.224864 %87 %
14Variations in H1, H2, and H3 Tags   Relevancy-0.221763 %87 %
15Variations in H1 and H2 Tags   Relevancy-0.211460 %86 %
16Variations in Div Tags   Relevancy-0.262511072 %91 %
17Entities in H1 Tags-0.196256 %91 %
18Number of Referring Domains   Authority-0.19170812351 %67 %
19Variations in P Tags   Relevancy-0.191313165 %89 %
20Variations in Body Tags   Relevancy-0.19179922377 %90 %
21Variations in HTML Tags   Relevancy-0.19179922076 %91 %
22Variations in Search Result Document File Name   Relevancy-0.193143 %80 %
23Number of Backlinks   Authority-0.19124727667852 %69 %
24Number of Factors Used   Diversity-0.1933917898 %89 %
25Entities in H2 Tags-0.1931752 %92 %
26Variations in LI Tags   Relevancy-0.191722164 %89 %
27Term Frequency   Relevancy-0.184376 %89 %
28Variations in A Tags   Relevancy-0.181402264 %86 %
29Variations in Sentences   Relevancy-0.182153370 %88 %
30Number of Do Follow Backlinks   Authority-0.18122239596547 %68 %
31Variations in the Title Tag   Relevancy-0.183264 %86 %
32Variations in Search Result URL Path   Relevancy-0.183145 %82 %
33Variation Count in Top 30KB   Relevancy-0.18771864 %85 %
34Clean Keyword Density in the HTML Tag   Relevancy-0.1816367 %79 %
35Number of Images   Size-0.183063476 %88 %
36Clean Text Kilobytes   Size-0.18311375 %88 %
37Unabridged Word Count   Size-0.184437186083 %89 %
38Word Count   Size-0.183797147183 %88 %
39Leading Variations in H1-H6 Tags   Relevancy-0.1814244 %87 %
40Variations in Search Result Link Text   Relevancy-0.183280 %82 %
41Number of Includes   Technology-0.18552780 %80 %
42Variations in Search Result Display URL   Relevancy-0.183280 %82 %
43Number of HTML Tags   Size-0.173693110883 %88 %
44Variations in First 100 Words   Relevancy-0.1717562 %86 %
45Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1711241 %87 %
46Variations in the Canonical URL   Relevancy-0.177246 %84 %
47Variations in H1 Tags   Relevancy-0.173153 %86 %
48Number of Images with ALT Text   Size-0.172792471 %87 %
49LSI Words in Sentences   Relevancy-0.17370377663 %95 %
50Variations in H2 Tags   Relevancy-0.1711345 %84 %
51Entities in H3 Tags-0.1743845 %93 %
52Search Result Number of Dirs in Path   Other-0.174272 %77 %
53Number of Heading Tags   Size-0.17672375 %86 %
54Has Entities in H1 Tags   Relevancy-0.171156 %87 %
55Variations in A Tag HREF Attributes   Relevancy-0.173233858 %90 %
56Number of P Tags   Size-0.171354074 %89 %
57Entities in Meta Description Tag   Relevancy-0.178358 %90 %
58Variations in Distinct A Tag HREF Attributes   Relevancy-0.172442358 %90 %
59Number of No Follow Backlinks   Authority-0.171967374340 %66 %
60Variation Density in Top 30KB   Relevancy-0.177258 %82 %
61Variations in Meta Description   Relevancy-0.174253 %84 %
62TF/IDF   Relevancy-0.171157 %85 %
63Variations in Span Tags   Relevancy-0.1741950 %89 %
64Variations in ALT Attributes   Relevancy-0.1655744 %84 %
65Title Tag Has Entities   Relevancy-0.161167 %88 %
66Number of HTTPS Links   Authority-0.1641915180 %87 %
67Number of DoFollow Links   Authority-0.1640914780 %86 %
68Number of Links   Authority-0.1642215280 %86 %
69Number of Forms   Technology-0.1619354 %83 %
70Variations in Main Tags   Relevancy-0.164846036 %87 %
71Number of Internal Links   Authority-0.1638913779 %87 %
72Leading Variations in Title Tag   Relevancy-0.161130 %80 %
73Variations in Absolute URLs   Relevancy-0.163105059 %88 %
74Variations in Search Result URL   Relevancy-0.164254 %77 %
75Number of CSS Includes   Technology-0.16261072 %78 %
76Variations in OpenGraph Description   Relevancy-0.164249 %81 %
77Percentage of DoFollow Links   Authority-0.16988179 %87 %
78Number of H1 Tags   Size-0.1611270 %88 %
79Variations in OpenGraph Title   Relevancy-0.163153 %79 %
80Number of Facebook Pages   Authority-0.166258 %80 %
81Number of External Links   Authority-0.16671576 %86 %
82Exact Matches in the HTML Tag   Relevancy-0.168261227 %82 %
83Number of DoFollow External Links   Authority-0.16641375 %85 %
84Percentage of DoFollow Internal Links   Authority-0.16907179 %85 %
85Has Form   Technology-0.161153 %79 %
86Number of Images without ALT Text   Size-0.16601158 %86 %
87Variations in Script Tags   Relevancy-0.168537161 %82 %
88Number of HTML Comments   Size-0.167075971 %84 %
89LSI Words in Title Tag   Relevancy-0.1616664 %93 %
90Has Entities in H2 Tags   Relevancy-0.161153 %85 %
91Average Words Per Sentence   Size-0.152293277 %83 %
92Number of H2 Tags   Size-0.1516767 %86 %
93LSI Words in H1 Tags   Relevancy-0.1517455 %93 %
94Leading Variations in H1 Tags   Relevancy-0.151126 %81 %
95Number of JavaScript Includes   Technology-0.15441880 %81 %
96Has Meta Charset   Technology-0.151174 %83 %
97Has JSON-LD Schema Markup   Relevancy-0.151154 %78 %
98Number of Sentences   Size-0.1558813081 %83 %
99Flesch Kincaid Reading Grade Level   Other-0.156195 %86 %
100Number of H3 Tags   Size-0.15331060 %85 %
101Variations in Nav Tags   Relevancy-0.152372345 %84 %
102Variations in H3 Tags   Relevancy-0.1516335 %84 %
103Search Result Host Length   Size-0.15251683 %80 %
104Search Result Domain Length   Size-0.15251683 %80 %
105LSI Words in Meta Description Tag   Relevancy-0.14361053 %91 %
106LSI Words in H2 Tags   Relevancy-0.14862053 %92 %
107Inline CSS Kilobytes   Size-0.141916164 %83 %
108Exact Matches in H1-H6 Tags   Relevancy-0.1411117 %83 %
109Variations in Footer Tags   Relevancy-0.1463634 %83 %
110Variations in Section Tags   Relevancy-0.14911736 %83 %
111Variations making whole H1-H6 Tags   Relevancy-0.142116 %78 %
112Variations making whole H1, H2, and H3 Tags   Relevancy-0.142114 %79 %
113Has Meta Viewport   Technology-0.141181 %82 %
114Has Canonical URL   Authority-0.141171 %79 %
115Page Size Kilobytes   Size-0.14110532282 %77 %
116Number Of JSON-LD Types   Relevancy-0.141181456 %82 %
117Search Result Uses HTTPS   Other-0.141183 %84 %
118Number of Questions   Size-0.14811166 %77 %
119Number of Questions In Headings   Size-0.148236 %82 %
120Number of Prices   Size-0.1429627470 %81 %
121Entities in H4 Tags-0.1419221 %89 %
122Leading Variations in H2 Tags   Relevancy-0.146121 %82 %
123Number of Absolute URLs   Authority-0.1499029182 %81 %
124Has Entities in H3 Tags   Relevancy-0.141146 %84 %
125Percentage of DoFollow External Links   Authority-0.14301074 %81 %
126Number of Social Pages   Authority-0.1414464 %81 %
127Number of Email Addresses   Trust-0.14280543 %79 %
128Number of Instagram Pages   Authority-0.1412244 %78 %
129Has Email   Trust-0.141143 %71 %
130Word Count in Meta Description   Size-0.14381967 %78 %
131Meta Description Length   Size-0.1421711867 %78 %
132Is Home Page   Other-0.131121 %44 %
133Has FavIcon   Technology-0.131174 %77 %
134Number of Nofollow Links   Authority-0.1344625 %77 %
135LSI Words in H3 Tags   Relevancy-0.131272347 %90 %
136Search Result URL Length   Size-0.13936298 %63 %
137Uses JSON-LD name   Other-0.131153 %77 %
138Variations in the last 100 words   Relevancy-0.1313344 %81 %
139Has Privacy Policy   Trust-0.131159 %74 %
140Number of LinkedIn Pages   Authority-0.135133 %77 %
141Is Store Page   Other-0.131146 %68 %
142Variations in Meta Twitter Content   Relevancy-0.132125 %69 %
143Has OpenGraph Type   Relevancy-0.131161 %71 %
144Variations Making Whole LI Tags   Relevancy-0.135124 %78 %
145Meta Description Tag Has Entities   Relevancy-0.131157 %82 %
146Variations making whole A Tags   Relevancy-0.136129 %77 %
147Variations in Meta Twitter Description   Relevancy-0.134124 %73 %
148Has Meta Description   Relevancy-0.131165 %73 %
149Headings Has Question   Other-0.131136 %76 %
150Variations in Strong Tags   Relevancy-0.1315325 %79 %
151Variations in I Tags   Relevancy-0.1317322 %81 %
152Number of Facebook Accounts   Authority-0.133128 %78 %
153Uses JSON-LD CollectionPage   Other-0.13115 %33 %
154Title Length   Size-0.131225081 %78 %
155Has Meta Twitter Card   Authority-0.131152 %65 %
156Is Purchase Page   Other-0.131147 %67 %
157Inline JavaScript Kilobytes   Size-0.1358711879 %72 %
158Has OpenGraph Image   Relevancy-0.131154 %69 %
159Number of Questions In H3 Tags   Size-0.135117 %76 %
160Has Schema Markup   Relevancy-0.131163 %74 %
161Number of US Phone Numbers   Trust-0.136011141 %81 %
162Uses Schema collectionpage   Other-0.13115 %33 %
163Title Word Count   Size-0.1318881 %76 %
164Number of H4 Tags   Size-0.1320437 %81 %
165Number of Social Accounts   Authority-0.1310243 %78 %
166Exact Matches in Top 30KB   Relevancy-0.1324215 %78 %
167Uses Schema name   Other-0.131160 %71 %
168Has Terms of Service   Trust-0.131141 %67 %
169Variations Making Whole Span Tags   Relevancy-0.137119 %81 %
170Uses JSON-LD url   Other-0.131147 %76 %
171Has Contact Page   Trust-0.131162 %70 %
172Has US Phone Number   Trust-0.121141 %72 %
173Variations in TITLE Attributes   Relevancy-0.1287535 %79 %
174Exact Matches in Sentences   Relevancy-0.1242218 %82 %
175Variations making whole H1 Tags   Relevancy-0.12118 %78 %
176Variations in H4-H6 Tags   Relevancy-0.1216118 %80 %
177Is Pagination Page   Other-0.121120 %65 %
178Has Google Verify   Technology-0.121122 %66 %
179Variations in ID Attributes   Relevancy-0.1210213 %82 %
180Uses Schema url   Other-0.121155 %68 %
181Variations in Button Tags   Relevancy-0.12125210 %81 %
182Has Meta Twitter Description   Authority-0.121130 %58 %
183Uses JSON-LD ItemList   Other-0.12114 %45 %
184Percentage of NoFollow Links   Authority-0.1215323 %75 %
185Leading Variations in H3 Tags   Relevancy-0.125116 %77 %
186Uses Schema itemlist   Other-0.12114 %46 %
187Uses JSON-LD ListItem   Other-0.121134 %71 %
188Number of NoFollow External Links   Authority-0.1221317 %75 %
189Uses Schema organization   Other-0.121134 %67 %
190Exact Matches in Title Tag   Relevancy-0.122115 %79 %
191Has Meta Twitter Title   Authority-0.121131 %58 %
192Number of Questions In H2 Tags   Size-0.124123 %73 %
193Uses Schema image   Other-0.121122 %70 %
194Has Entities in H4 Tags   Relevancy-0.121122 %78 %
195Is Category Page   Other-0.121115 %66 %
196Number of Twitter Accounts   Authority-0.122125 %70 %
197Is Article Page   Other-0.121141 %66 %
198Variations in H4 Tags   Relevancy-0.125113 %78 %
199Has Apple Touch Icon   Technology-0.121151 %73 %
200Uses JSON-LD image   Other-0.121117 %69 %