Measures 153914 SEO Factors

152192 Built-In SEO Factors

142974 On-page SEO Factors

9218 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 2026-07     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-0.2993824366 %78 %
2Number of Top 200 Shared Factors Used   Diversity-0.26523680 %90 %
3Number of Top 100 Shared Factors Used   Diversity-0.26392780 %90 %
4Number of Referring Domains   Authority-0.259845130 %87 %
5Number of Top 50 Shared Factors Used   Diversity-0.25161180 %91 %
6Entities in Sentences   Relevancy-0.2595414452 %94 %
7Number of P Tags   Size-0.252183553 %89 %
8Number of Heading Tags   Size-0.25591955 %86 %
9Variations in H1-H6 Tags   Relevancy-0.252921043 %83 %
10Number of Backlinks   Authority-0.25197596291630 %88 %
11Load Time Milliseconds   Performance-0.2525940217368 %86 %
12Word Count   Size-0.2512278138567 %87 %
13Entities in the HTML Tag   Relevancy-0.25105014858 %94 %
14Clean Text Kilobytes   Size-0.242841354 %85 %
15Variations in H1, H2, and H3 Tags   Relevancy-0.24259943 %85 %
16Unabridged Word Count   Size-0.2456122197367 %87 %
17Number of Do Follow Backlinks   Authority-0.24188984269728 %86 %
18Entities in H2 Tags-0.2454736 %92 %
19Variations in P Tags   Relevancy-0.2440147043 %88 %
20Number of H2 Tags   Size-0.2429648 %86 %
21Variations in H1 and H2 Tags   Relevancy-0.24123541 %84 %
22Number of Images   Size-0.241652555 %87 %
23Has Meta Charset   Technology-0.241155 %81 %
24Number of Unique Variations Used   Diversity-0.24591262 %80 %
25Number of Distinct Entities Used   Diversity-0.23652862 %92 %
26Variations in Div Tags   Relevancy-0.233586450553 %87 %
27Variations in Search Result Document File Name   Relevancy-0.237135 %82 %
28Variations in LI Tags   Relevancy-0.2317434043 %86 %
29Number of HTML Tags   Size-0.23417298368 %88 %
30Variations in A Tags   Relevancy-0.2354227245 %82 %
31Number of Images with ALT Text   Size-0.23851650 %88 %
32Number of DoFollow Links   Authority-0.2341912261 %88 %
33Number of Factors Used   Diversity-0.2329616980 %85 %
34Number of Links   Authority-0.2345212562 %88 %
35Number of HTTPS Links   Authority-0.2341912461 %88 %
36Number of No Follow Backlinks   Authority-0.232628126621 %83 %
37Variation Count in Top 30KB   Relevancy-0.2354787948 %80 %
38Number of H1 Tags   Size-0.2311151 %87 %
39Number of Internal Links   Authority-0.2239011260 %87 %
40Entities in Title Tag   Relevancy-0.2210351 %89 %
41Number of External Links   Authority-0.221351457 %89 %
42Has JSON-LD Schema Markup   Relevancy-0.221137 %78 %
43Has Entities in H2 Tags   Relevancy-0.221137 %86 %
44Entities in H1 Tags-0.2217238 %90 %
45Variations in Body Tags   Relevancy-0.2294781119760 %85 %
46Variations in Search Result URL Path   Relevancy-0.228237 %81 %
47Has Entities in H1 Tags   Relevancy-0.221138 %86 %
48Search Result Number of Dirs in Path   Other-0.223262 %80 %
49Variations in Distinct A Tag HREF Attributes   Relevancy-0.2215294442 %86 %
50Variations in H2 Tags   Relevancy-0.22117431 %82 %
51LSI Words in Sentences   Relevancy-0.22446659748 %92 %
52Variations in H1 Tags   Relevancy-0.2211137 %81 %
53Variations in A Tag HREF Attributes   Relevancy-0.2222546841 %86 %
54Number of DoFollow External Links   Authority-0.221341256 %90 %
55Entities in H3 Tags-0.2251830 %93 %
56Average Words Per Sentence   Size-0.222873158 %86 %
57Number of Facebook Pages   Authority-0.225239 %86 %
58Variations in HTML Tags   Relevancy-0.2194781116558 %88 %
59Number of Images without ALT Text   Size-0.21113940 %85 %
60Number of HTML Comments   Size-0.215634953 %84 %
61Number of Includes   Technology-0.21602562 %83 %
62Flesch Kincaid Reading Grade Level   Other-0.216174 %87 %
63Leading Variations in H1-H6 Tags   Relevancy-0.2118231 %82 %
64Number Of JSON-LD Types   Relevancy-0.211511340 %83 %
65Leading Variations in H1, H2, and H3 Tags   Relevancy-0.2113229 %82 %
66Number of H3 Tags   Size-0.2137841 %88 %
67Variations in Span Tags   Relevancy-0.218341935 %89 %
68Variations in Absolute URLs   Relevancy-0.2919612445 %84 %
69Variations in Sentences   Relevancy-0.241268152 %87 %
70Variations in Main Tags   Relevancy-0.22030823426 %84 %
71Variations in ALT Attributes   Relevancy-0.2247931 %79 %
72Variations in the Canonical URL   Relevancy-0.246237 %84 %
73Term Frequency   Relevancy-0.26358 %85 %
74Number of Social Pages   Authority-0.223545 %85 %
75Variations in Nav Tags   Relevancy-0.21181610233 %85 %
76LSI Words in H2 Tags   Relevancy-0.21931737 %90 %
77Search Result Domain is .com, .net, or .org   Other-0.2117 %78 %
78Search Result Domain is .com   Other-0.2116 %76 %
79Percentage of DoFollow Links   Authority-0.2997961 %80 %
80Number of Forms   Technology-0.215236 %78 %
81Clean Keyword Density in the HTML Tag   Relevancy-0.2195752 %73 %
82Number of CSS Includes   Technology-0.1925955 %74 %
83Variations in First 100 Words   Relevancy-0.19172949 %84 %
84Number of Sentences   Size-0.1989314065 %84 %
85Variations in Search Result URL   Relevancy-0.1923244 %77 %
86Variations in H3 Tags   Relevancy-0.19195524 %83 %
87Search Result Uses HTTPS   Other-0.191166 %70 %
88Number of Instagram Pages   Authority-0.1921330 %82 %
89Uses JSON-LD name   Other-0.191137 %78 %
90Has Form   Technology-0.191135 %76 %
91Number of Questions In Headings   Size-0.197224 %82 %
92Has Entities in H3 Tags   Relevancy-0.191130 %86 %
93Entities in Meta Description Tag   Relevancy-0.1914343 %84 %
94Has Meta Viewport   Technology-0.191163 %76 %
95Number of LinkedIn Pages   Authority-0.194121 %80 %
96Percentage of DoFollow External Links   Authority-0.19321254 %81 %
97LSI Words in H1 Tags   Relevancy-0.1933439 %89 %
98Variations in Footer Tags   Relevancy-0.1948965027 %80 %
99Number of Facebook Accounts   Authority-0.193118 %80 %
100Search Result Domain Length   Size-0.19231667 %77 %
101Search Result Host Length   Size-0.19231667 %77 %
102Has Apple Touch Icon   Technology-0.191133 %74 %
103Variations in Section Tags   Relevancy-0.1916063525 %87 %
104Number of Social Accounts   Authority-0.196227 %85 %
105Percentage of DoFollow Internal Links   Authority-0.18926860 %76 %
106Number of JavaScript Includes   Technology-0.18481863 %84 %
107Variation Density in Top 30KB   Relevancy-0.18328647 %74 %
108Page Size Kilobytes   Size-0.1899432465 %65 %
109Title Tag Has Entities   Relevancy-0.181150 %79 %
110Has Canonical URL   Authority-0.181154 %67 %
111Inline CSS Kilobytes   Size-0.182245951 %82 %
112Is Article Page   Other-0.181129 %73 %
113Headings Has Question   Other-0.181124 %80 %
114Variations in OpenGraph Description   Relevancy-0.1843237 %74 %
115Variations in Meta Description   Relevancy-0.1839240 %76 %
116Variations in the Title Tag   Relevancy-0.1811248 %77 %
117Uses JSON-LD url   Other-0.181134 %76 %
118Uses Schema organization   Other-0.181124 %74 %
119TF/IDF   Relevancy-0.181142 %81 %
120Has Privacy Policy   Trust-0.181142 %71 %
121Variations in OpenGraph Title   Relevancy-0.189241 %72 %
122Variations in Script Tags   Relevancy-0.182198622049 %82 %
123LSI Words in H3 Tags   Relevancy-0.171701931 %90 %
124Number of Absolute URLs   Authority-0.17194826066 %73 %
125Uses JSON-LD description   Other-0.171129 %73 %
126Has FavIcon   Technology-0.171156 %71 %
127Variations Making Whole LI Tags   Relevancy-0.177118 %79 %
128Leading Variations in H1 Tags   Relevancy-0.171118 %76 %
129Variations Making Whole Span Tags   Relevancy-0.176114 %81 %
130Uses JSON-LD ListItem   Other-0.171124 %75 %
131Variations making whole A Tags   Relevancy-0.1725221 %81 %
132Uses JSON-LD Organization   Other-0.171123 %76 %
133LSI Words in Title Tag   Relevancy-0.1724550 %83 %
134Uses JSON-LD BreadcrumbList   Other-0.171123 %76 %
135Has Meta Description   Relevancy-0.171149 %65 %
136Search Result URL Length   Size-0.17966679 %60 %
137Number of H4 Tags   Size-0.1731324 %83 %
138Has Contact Page   Trust-0.171147 %69 %
139Variations in Search Result Display URL   Relevancy-0.1714263 %73 %
140Variations in Search Result Link Text   Relevancy-0.1714263 %73 %
141Number of Questions   Size-0.17641349 %74 %
142Word Count in Meta Description   Size-0.17571850 %72 %
143Inline JavaScript Kilobytes   Size-0.1756113562 %64 %
144Meta Description Length   Size-0.1733411250 %71 %
145Number of US Phone Numbers   Trust-0.16212929 %85 %
146Is Store Page   Other-0.161135 %66 %
147Has Schema Markup   Relevancy-0.161147 %64 %
148Uses JSON-LD datePublished   Other-0.161123 %71 %
149Number of Prices   Size-0.16373813154 %78 %
150Uses Schema datemodified   Other-0.161121 %70 %
151Title Word Count   Size-0.1628866 %70 %
152Number of Questions In H2 Tags   Size-0.164116 %80 %
153Has US Phone Number   Trust-0.161128 %78 %
154Meta Description Tag Has Entities   Relevancy-0.161141 %72 %
155Uses JSON-LD dateModified   Other-0.161120 %72 %
156LSI Words in Meta Description Tag   Relevancy-0.1623941 %86 %
157Uses Schema name   Other-0.161143 %64 %
158Search Result Summary Length   Size-0.1616114878 %77 %
159Variations in Strong Tags   Relevancy-0.16129317 %84 %
160Title Length   Size-0.161705266 %71 %
161Has OpenGraph Type   Relevancy-0.161147 %65 %
162Is OpenGraph Type Article   Technology-0.161121 %67 %
163Leading Variations in Title Tag   Relevancy-0.161121 %76 %
164Variations in the last 100 words   Relevancy-0.16179639 %74 %
165Leading Variations in H2 Tags   Relevancy-0.166116 %80 %
166Variations in Article Tags   Relevancy-0.1647262816 %78 %
167Number of Twitter Accounts   Authority-0.162114 %78 %
168Uses JSON-LD ImageObject   Other-0.161122 %75 %
169Has Meta Robots   Other-0.161118 %69 %
170Uses Schema webpage   Other-0.161122 %72 %
171Has Google Verify   Technology-0.161113 %72 %
172Has OpenGraph Image   Relevancy-0.161142 %66 %
173Has Terms of Service   Trust-0.161131 %65 %
174Uses JSON-LD WebPage   Other-0.161121 %73 %
175Number of Questions In H3 Tags   Size-0.155112 %80 %
176Variations in Search Result Summary   Relevancy-0.1548363 %68 %
177Number of Email Addresses   Trust-0.1540432 %78 %
178Uses Schema url   Other-0.151140 %62 %
179Variations making whole H1-H6 Tags   Relevancy-0.152111 %79 %
180Variations making whole H1, H2, and H3 Tags   Relevancy-0.151110 %78 %
181Entities in H4 Tags-0.1511214 %89 %
182Variations in Button Tags   Relevancy-0.1533122911 %81 %
183Variations in Class Attributes   Relevancy-0.15970410718 %80 %
184Is Purchase Page   Other-0.151136 %56 %
185Has Meta Twitter Card   Authority-0.151141 %63 %
186Uses JSON-LD item-0.151117 %74 %
187Uses Schema description   Other-0.151134 %58 %
188Has DocType Tag   Technology-0.151157 %58 %
189Uses Schema product   Other-0.15117 %48 %
190Uses Schema datepublished   Other-0.151126 %56 %
191Has Copyright   Trust-0.151146 %59 %
192Uses Schema website   Other-0.151122 %65 %
193Number Of Claimed Brands   Other-0.1572216 %75 %
194Uses JSON-LD headline-0.151113 %67 %
195Uses Schema listitem   Other-0.151129 %59 %
196Number of Nofollow Links   Authority-0.1591417 %75 %
197Uses Schema breadcrumblist   Other-0.151128 %59 %
198Uses JSON-LD Product   Other-0.15117 %48 %
199Uses JSON-LD inLanguage   Other-0.151120 %67 %
200Uses Schema headline   Other-0.151114 %66 %