Measures 150455 SEO Factors

148733 Built-In SEO Factors

139531 On-page SEO Factors

9202 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 2026-04     previous

Top SEO Factor data is updated daily for latest "month to date" measurements.

NameCorrelation#1 MaxPage 1 AvgUsage %Searches %
1Number of Unique Variations Used   Diversity-0.2332673 %91 %
2Load Time Milliseconds   Performance-0.2314022146481 %92 %
3Number of Unique LSI Words Used   Diversity-0.2289730279 %82 %
4Number of Top 50 Shared Factors Used   Diversity-0.22161193 %94 %
5Number of Top 200 Shared Factors Used   Diversity-0.22503696 %94 %
6Number of Top 100 Shared Factors Used   Diversity-0.22382796 %95 %
7Search Result Domain is .com, .net, or .org   Other-0.22116 %79 %
8Search Result Domain is .com   Other-0.21116 %78 %
9Number of Distinct Entities Used   Diversity-0.21602773 %94 %
10Entities in Title Tag   Relevancy-0.27361 %93 %
11Variations in H1 and H2 Tags   Relevancy-0.2103452 %92 %
12Variations in H1, H2, and H3 Tags   Relevancy-0.2192754 %91 %
13Variations in H1-H6 Tags   Relevancy-0.2212855 %91 %
14Variations in Body Tags   Relevancy-0.2123426145971 %91 %
15Variations in HTML Tags   Relevancy-0.2123426145271 %92 %
16Number of Factors Used   Diversity-0.227116796 %93 %
17Variations in P Tags   Relevancy-0.1926374857 %92 %
18Variations in Div Tags   Relevancy-0.195727450366 %91 %
19Entities in H2 Tags-0.1927746 %94 %
20Entities in Sentences   Relevancy-0.1944913561 %96 %
21Term Frequency   Relevancy-0.196371 %90 %
22Entities in the HTML Tag   Relevancy-0.1945113966 %96 %
23Variations in Search Result Display URL   Relevancy-0.1916274 %83 %
24Variations in Search Result Link Text   Relevancy-0.1916274 %83 %
25Entities in H1 Tags-0.197249 %92 %
26Variations in Sentences   Relevancy-0.1952138464 %92 %
27Variations in the Title Tag   Relevancy-0.1914258 %88 %
28Leading Variations in H1-H6 Tags   Relevancy-0.1820237 %89 %
29Variations in H1 Tags   Relevancy-0.1813146 %88 %
30Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1817235 %90 %
31LSI Words in Sentences   Relevancy-0.18303376162 %95 %
32Variations in Search Result Document File Name   Relevancy-0.189138 %88 %
33LSI Words in Title Tag   Relevancy-0.1827667 %93 %
34Variation Count in Top 30KB   Relevancy-0.1844126657 %89 %
35Word Count   Size-0.184223140181 %90 %
36Variations in LI Tags   Relevancy-0.1831944055 %92 %
37Unabridged Word Count   Size-0.188545193881 %90 %
38Number of HTML Tags   Size-0.18271398480 %86 %
39Variations in A Tags   Relevancy-0.1859706355 %90 %
40Variations in Meta Description   Relevancy-0.1834248 %86 %
41Variations in H2 Tags   Relevancy-0.1799338 %91 %
42LSI Words in H1 Tags   Relevancy-0.1714553 %93 %
43Number of Includes   Technology-0.17492575 %80 %
44Clean Text Kilobytes   Size-0.17491366 %88 %
45Entities in H3 Tags-0.1728738 %94 %
46Number of Images with ALT Text   Size-0.171202162 %86 %
47Entities in Meta Description Tag   Relevancy-0.178353 %90 %
48Variations in Search Result URL Path   Relevancy-0.1710140 %88 %
49TF/IDF   Relevancy-0.171149 %87 %
50Variations in OpenGraph Title   Relevancy-0.1712148 %83 %
51Number of Facebook Pages   Authority-0.176251 %85 %
52Clean Keyword Density in the HTML Tag   Relevancy-0.17177562 %86 %
53Number of P Tags   Size-0.17993665 %89 %
54Variations in the Canonical URL   Relevancy-0.1759241 %88 %
55Number of Heading Tags   Size-0.17531967 %89 %
56Number of Images   Size-0.171252968 %88 %
57Variations in OpenGraph Description   Relevancy-0.1732243 %84 %
58Variations in ALT Attributes   Relevancy-0.1712941639 %83 %
59Leading Variations in Title Tag   Relevancy-0.171127 %81 %
60Number of H2 Tags   Size-0.1716760 %90 %
61Variations in Script Tags   Relevancy-0.165826859357 %87 %
62Has Entities in H1 Tags   Relevancy-0.161148 %88 %
63Search Result Number of Dirs in Path   Other-0.163273 %78 %
64Variations in Span Tags   Relevancy-0.1614821943 %90 %
65Number of HTTPS Links   Authority-0.1660013173 %87 %
66Number of H1 Tags   Size-0.165162 %91 %
67Number of Links   Authority-0.1660113273 %88 %
68Number of Internal Links   Authority-0.1659511971 %87 %
69Number of DoFollow Links   Authority-0.1659212973 %88 %
70Variation Density in Top 30KB   Relevancy-0.16279553 %86 %
71Variations in Main Tags   Relevancy-0.162745827833 %89 %
72Number of CSS Includes   Technology-0.1622968 %82 %
73Leading Variations in H1 Tags   Relevancy-0.162123 %86 %
74Variations in Absolute URLs   Relevancy-0.161033614951 %93 %
75Variations in Search Result URL   Relevancy-0.1619248 %84 %
76Has JSON-LD Schema Markup   Relevancy-0.161148 %84 %
77LSI Words in H2 Tags   Relevancy-0.16962151 %95 %
78Has Entities in H2 Tags   Relevancy-0.161147 %90 %
79Variations in First 100 Words   Relevancy-0.16178657 %90 %
80Variations in A Tag HREF Attributes   Relevancy-0.1634885249 %90 %
81Percentage of DoFollow Internal Links   Authority-0.16946772 %86 %
82Exact Matches in the HTML Tag   Relevancy-0.164321126 %86 %
83Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621333449 %91 %
84Percentage of DoFollow Links   Authority-0.161007773 %90 %
85Number of Sentences   Size-0.1666013777 %85 %
86Average Words Per Sentence   Size-0.151493271 %86 %
87Flesch Kincaid Reading Grade Level   Other-0.156193 %89 %
88Search Result Domain Length   Size-0.15251681 %85 %
89Search Result Host Length   Size-0.15251681 %85 %
90Number Of JSON-LD Types   Relevancy-0.152292151 %88 %
91Search Result Uses HTTPS   Other-0.151180 %84 %
92Variations in Section Tags   Relevancy-0.1516112633 %88 %
93Variations in Nav Tags   Relevancy-0.15107565239 %85 %
94Number of Referring Domains   Authority-0.15701913144 %77 %
95Number of H3 Tags   Size-0.1528852 %85 %
96LSI Words in Meta Description Tag   Relevancy-0.15301154 %91 %
97Has Canonical URL   Authority-0.151166 %80 %
98Number of Backlinks   Authority-0.1519454221731344 %79 %
99Has Meta Charset   Technology-0.151168 %81 %
100Number of Absolute URLs   Authority-0.1592726379 %81 %
101Number of Questions In Headings   Size-0.1510232 %84 %
102Number of HTML Comments   Size-0.154094763 %86 %
103Number of Images without ALT Text   Size-0.1571851 %87 %
104Number of DoFollow External Links   Authority-0.15561268 %86 %
105Title Tag Has Entities   Relevancy-0.151161 %88 %
106Number of Do Follow Backlinks   Authority-0.1519453741145540 %77 %
107Number of Forms   Technology-0.159246 %79 %
108Number of JavaScript Includes   Technology-0.15401776 %77 %
109Number of External Links   Authority-0.15591369 %88 %
110Title Word Count   Size-0.1540878 %79 %
111Variations in H3 Tags   Relevancy-0.14119429 %87 %
112Title Length   Size-0.142365279 %78 %
113Word Count in Meta Description   Size-0.14391963 %80 %
114Leading Variations in H2 Tags   Relevancy-0.147118 %87 %
115Meta Description Length   Size-0.1420711563 %80 %
116Has Meta Description   Relevancy-0.141162 %80 %
117Uses JSON-LD name   Other-0.141148 %82 %
118Number of Facebook Accounts   Authority-0.143124 %79 %
119Number of No Follow Backlinks   Authority-0.141851383686834 %71 %
120Has Meta Viewport   Technology-0.141177 %82 %
121Uses Schema name   Other-0.141157 %73 %
122Inline CSS Kilobytes   Size-0.142075662 %84 %
123Has Privacy Policy   Trust-0.141153 %82 %
124Has Schema Markup   Relevancy-0.141159 %78 %
125Page Size Kilobytes   Size-0.14103733979 %73 %
126Has Form   Technology-0.141145 %78 %
127Number of US Phone Numbers   Trust-0.141311137 %83 %
128Has Entities in H3 Tags   Relevancy-0.141138 %86 %
129Number of Questions   Size-0.14651263 %79 %
130Headings Has Question   Other-0.141131 %82 %
131LSI Words in H3 Tags   Relevancy-0.141062244 %90 %
132Meta Description Tag Has Entities   Relevancy-0.141152 %83 %
133Variations making whole H1-H6 Tags   Relevancy-0.142112 %80 %
134Variations in Footer Tags   Relevancy-0.1438282931 %86 %
135Number of Social Pages   Authority-0.1420457 %80 %
136Has Meta Twitter Card   Authority-0.141150 %65 %
137Variations in Strong Tags   Relevancy-0.13110222 %82 %
138Has US Phone Number   Trust-0.131139 %76 %
139Has OpenGraph Type   Relevancy-0.131157 %73 %
140Has Contact Page   Trust-0.131156 %76 %
141Uses Schema url   Other-0.131152 %72 %
142Uses JSON-LD url   Other-0.131140 %81 %
143Entities in H4 Tags-0.1314217 %89 %
144Number of LinkedIn Pages   Authority-0.133125 %83 %
145Variations Making Whole LI Tags   Relevancy-0.134119 %82 %
146Number of H4 Tags   Size-0.1327330 %79 %
147Exact Matches in H1-H6 Tags   Relevancy-0.1313117 %86 %
148Has OpenGraph Image   Relevancy-0.131153 %72 %
149Number of Social Accounts   Authority-0.137237 %85 %
150Variations making whole H1, H2, and H3 Tags   Relevancy-0.132110 %81 %
151Uses JSON-LD description   Other-0.131139 %76 %
152Variations making whole A Tags   Relevancy-0.13101223 %84 %
153Percentage of DoFollow External Links   Authority-0.13241167 %84 %
154Number of Instagram Pages   Authority-0.1317240 %78 %
155Has FavIcon   Technology-0.131170 %73 %
156Number of Questions In H2 Tags   Size-0.134121 %80 %
157Is Article Page   Other-0.131139 %72 %
158Number of Prices   Size-0.133919965 %80 %
159Number of Email Addresses   Trust-0.1358437 %82 %
160Uses JSON-LD ListItem   Other-0.131131 %77 %
161Uses JSON-LD BreadcrumbList   Other-0.131130 %75 %
162Exact Matches in Sentences   Relevancy-0.1348319 %88 %
163Variations Making Whole Span Tags   Relevancy-0.139116 %86 %
164Number of Nofollow Links   Authority-0.1318422 %82 %
165Is OpenGraph Type Article   Technology-0.131129 %66 %
166Number Of Claimed Brands   Other-0.1320222 %78 %
167Inline JavaScript Kilobytes   Size-0.1352415775 %72 %
168Uses Schema listitem   Other-0.131139 %70 %
169Uses Schema description   Other-0.121145 %70 %
170Exact Matches in Top 30KB   Relevancy-0.1219115 %84 %
171Uses Schema breadcrumblist   Other-0.121138 %69 %
172Variations in Meta Twitter Description   Relevancy-0.1220122 %75 %
173Variations in the last 100 words   Relevancy-0.12175440 %82 %
174Exact Matches in Title Tag   Relevancy-0.122114 %85 %
175Uses JSON-LD datePublished   Other-0.121130 %66 %
176Uses JSON-LD Organization   Other-0.121128 %76 %
177Uses Schema datemodified   Other-0.121128 %62 %
178Uses Schema website   Other-0.121129 %66 %
179Number of Questions In H3 Tags   Size-0.127115 %77 %
180Uses Schema organization   Other-0.121131 %73 %
181Uses JSON-LD ImageObject   Other-0.121129 %67 %
182Variations in I Tags   Relevancy-0.12394518 %82 %
183Has Email   Trust-0.121137 %74 %
184Variations in TITLE Attributes   Relevancy-0.125631033 %82 %
185Uses Schema unitcode   Other-0.12114 %16 %
186Number of Twitter Accounts   Authority-0.122120 %77 %
187Has Terms of Service   Trust-0.121137 %74 %
188Percentage of NoFollow Links   Authority-0.1215220 %79 %
189Uses JSON-LD dateModified   Other-0.121127 %65 %
190Is Pagination Page   Other-0.121117 %67 %
191Variations in Meta Twitter Content   Relevancy-0.125124 %73 %
192Has Meta Robots   Other-0.121122 %75 %
193Uses Schema product   Other-0.121110 %50 %
194Uses JSON-LD WebSite   Other-0.121125 %72 %
195Variations in Article Tags   Relevancy-0.1213381620 %82 %
196Uses Schema item   Other-0.121129 %61 %
197Leading Variations in H3 Tags   Relevancy-0.1210112 %79 %
198Number of HREF Lang Tags   Size-0.1257311 %75 %
199Uses Schema imageobject   Other-0.121136 %60 %
200Uses JSON-LD unitCode   Other-0.12114 %17 %