Measures 150450 SEO Factors

148728 Built-In SEO Factors

139526 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-0.2314022145781 %92 %
3Number of Unique LSI Words Used   Diversity-0.2289730479 %83 %
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 %94 %
7Search Result Domain is .com, .net, or .org   Other-0.21116 %79 %
8Search Result Domain is .com   Other-0.21116 %78 %
9Number of Distinct Entities Used   Diversity-0.21602773 %95 %
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 Body Tags   Relevancy-0.2123426148071 %91 %
14Variations in H1-H6 Tags   Relevancy-0.2212855 %91 %
15Variations in HTML Tags   Relevancy-0.2123426147571 %92 %
16Number of Factors Used   Diversity-0.227116896 %93 %
17Variations in P Tags   Relevancy-0.1926374857 %92 %
18Variations in Div Tags   Relevancy-0.195727451166 %91 %
19Term Frequency   Relevancy-0.196371 %90 %
20Entities in H2 Tags-0.1927746 %94 %
21Entities in Sentences   Relevancy-0.1944913561 %96 %
22Entities in the HTML Tag   Relevancy-0.1945113966 %97 %
23Variations in Sentences   Relevancy-0.1952138564 %91 %
24Variations in Search Result Display URL   Relevancy-0.1916274 %83 %
25Variations in Search Result Link Text   Relevancy-0.1916274 %83 %
26Entities in H1 Tags-0.197249 %92 %
27Variations in the Title Tag   Relevancy-0.1914259 %88 %
28Variations in H1 Tags   Relevancy-0.1813146 %88 %
29Leading Variations in H1-H6 Tags   Relevancy-0.1820237 %89 %
30LSI Words in Sentences   Relevancy-0.18303376962 %95 %
31LSI Words in Title Tag   Relevancy-0.1827667 %93 %
32Variations in Search Result Document File Name   Relevancy-0.189138 %88 %
33Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1817235 %90 %
34Variation Count in Top 30KB   Relevancy-0.1844126757 %90 %
35Word Count   Size-0.184223140781 %90 %
36Variations in LI Tags   Relevancy-0.1831944155 %92 %
37Unabridged Word Count   Size-0.188545194581 %90 %
38Number of HTML Tags   Size-0.18271398681 %86 %
39Variations in A Tags   Relevancy-0.1859706455 %90 %
40Variations in Meta Description   Relevancy-0.1734248 %86 %
41LSI Words in H1 Tags   Relevancy-0.1714553 %93 %
42Variations in H2 Tags   Relevancy-0.1799339 %91 %
43Number of Includes   Technology-0.17492575 %80 %
44Clean Text Kilobytes   Size-0.17491366 %88 %
45Number of Images with ALT Text   Size-0.171202163 %86 %
46TF/IDF   Relevancy-0.171149 %87 %
47Variations in Search Result URL Path   Relevancy-0.1710140 %89 %
48Variations in OpenGraph Title   Relevancy-0.1712149 %83 %
49Entities in H3 Tags-0.1728738 %94 %
50Entities in Meta Description Tag   Relevancy-0.178353 %90 %
51Number of Facebook Pages   Authority-0.176251 %86 %
52Number of P Tags   Size-0.17993666 %89 %
53Clean Keyword Density in the HTML Tag   Relevancy-0.17177562 %86 %
54Number of Heading Tags   Size-0.17531967 %88 %
55Variations in the Canonical URL   Relevancy-0.1759241 %88 %
56Number of Images   Size-0.171252968 %88 %
57Variations in ALT Attributes   Relevancy-0.1712941639 %84 %
58Variations in Script Tags   Relevancy-0.175826860158 %87 %
59Leading Variations in Title Tag   Relevancy-0.171127 %81 %
60Search Result Number of Dirs in Path   Other-0.173273 %78 %
61Variations in OpenGraph Description   Relevancy-0.1732243 %84 %
62Number of H2 Tags   Size-0.1616761 %90 %
63Has Entities in H1 Tags   Relevancy-0.161148 %88 %
64Number of HTTPS Links   Authority-0.1660013173 %87 %
65Variations in Span Tags   Relevancy-0.1614821943 %90 %
66Number of H1 Tags   Size-0.165162 %91 %
67Number of Links   Authority-0.1660113273 %88 %
68Number of Internal Links   Authority-0.1659512072 %87 %
69Number of DoFollow Links   Authority-0.1659212973 %88 %
70Variation Density in Top 30KB   Relevancy-0.16279553 %87 %
71Variations in Main Tags   Relevancy-0.162745828233 %89 %
72Number of CSS Includes   Technology-0.1622969 %82 %
73Variations in Absolute URLs   Relevancy-0.161033615051 %93 %
74Leading Variations in H1 Tags   Relevancy-0.162123 %86 %
75Has JSON-LD Schema Markup   Relevancy-0.161148 %84 %
76Variations in Search Result URL   Relevancy-0.1619248 %84 %
77LSI Words in H2 Tags   Relevancy-0.16962151 %94 %
78Has Entities in H2 Tags   Relevancy-0.161147 %90 %
79Percentage of DoFollow Internal Links   Authority-0.16946772 %86 %
80Variations in A Tag HREF Attributes   Relevancy-0.1634885249 %91 %
81Variations in First 100 Words   Relevancy-0.16178757 %90 %
82Number of Sentences   Size-0.1666013777 %85 %
83Percentage of DoFollow Links   Authority-0.161007773 %90 %
84Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621333549 %91 %
85Flesch Kincaid Reading Grade Level   Other-0.156193 %90 %
86Average Words Per Sentence   Size-0.151493271 %86 %
87Exact Matches in the HTML Tag   Relevancy-0.154321126 %86 %
88Search Result Uses HTTPS   Other-0.151180 %84 %
89Number Of JSON-LD Types   Relevancy-0.152292151 %88 %
90Search Result Domain Length   Size-0.15251681 %85 %
91Search Result Host Length   Size-0.15251681 %85 %
92LSI Words in Meta Description Tag   Relevancy-0.15301155 %91 %
93Variations in Nav Tags   Relevancy-0.15107565339 %86 %
94Number of Referring Domains   Authority-0.15701913244 %77 %
95Variations in Section Tags   Relevancy-0.1516112633 %88 %
96Number of Backlinks   Authority-0.1519454221757845 %79 %
97Number of H3 Tags   Size-0.1528852 %85 %
98Has Canonical URL   Authority-0.151166 %80 %
99Has Meta Charset   Technology-0.151168 %81 %
100Number of Questions In Headings   Size-0.1510232 %85 %
101Number of Absolute URLs   Authority-0.1592726479 %81 %
102Number of HTML Comments   Size-0.154094663 %86 %
103Number of Do Follow Backlinks   Authority-0.1519453741163240 %77 %
104Number of DoFollow External Links   Authority-0.15561268 %86 %
105Number of Images without ALT Text   Size-0.1571851 %87 %
106Title Tag Has Entities   Relevancy-0.151161 %88 %
107Number of Forms   Technology-0.159246 %79 %
108Number of JavaScript Includes   Technology-0.15401776 %77 %
109Title Word Count   Size-0.1540879 %79 %
110Number of External Links   Authority-0.15591369 %88 %
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 %
116Number of No Follow Backlinks   Authority-0.141851383698034 %71 %
117Uses JSON-LD name   Other-0.141148 %82 %
118Number of Facebook Accounts   Authority-0.143125 %79 %
119Has Meta Viewport   Technology-0.141177 %82 %
120Has Meta Description   Relevancy-0.141162 %80 %
121Uses Schema name   Other-0.141157 %73 %
122Inline CSS Kilobytes   Size-0.142075663 %84 %
123Has Schema Markup   Relevancy-0.141160 %77 %
124Has Privacy Policy   Trust-0.141153 %82 %
125Page Size Kilobytes   Size-0.14103734079 %72 %
126Number of Questions   Size-0.14651263 %79 %
127Number of US Phone Numbers   Trust-0.141311138 %83 %
128Has Form   Technology-0.141146 %78 %
129Headings Has Question   Other-0.141131 %82 %
130Has Entities in H3 Tags   Relevancy-0.141138 %86 %
131LSI Words in H3 Tags   Relevancy-0.141062244 %90 %
132Meta Description Tag Has Entities   Relevancy-0.141153 %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 %
136Variations in Strong Tags   Relevancy-0.14110322 %83 %
137Has US Phone Number   Trust-0.131139 %75 %
138Has Meta Twitter Card   Authority-0.131150 %65 %
139Uses Schema url   Other-0.131152 %72 %
140Has Contact Page   Trust-0.131156 %76 %
141Variations Making Whole LI Tags   Relevancy-0.134119 %83 %
142Uses JSON-LD url   Other-0.131140 %82 %
143Has OpenGraph Type   Relevancy-0.131158 %73 %
144Number of LinkedIn Pages   Authority-0.133126 %83 %
145Entities in H4 Tags-0.1314217 %89 %
146Number of H4 Tags   Size-0.1327330 %80 %
147Number of Social Accounts   Authority-0.137237 %85 %
148Exact Matches in H1-H6 Tags   Relevancy-0.1313117 %86 %
149Has OpenGraph Image   Relevancy-0.131153 %72 %
150Variations making whole H1, H2, and H3 Tags   Relevancy-0.132110 %81 %
151Variations making whole A Tags   Relevancy-0.13101223 %84 %
152Uses JSON-LD description   Other-0.131139 %76 %
153Number of Instagram Pages   Authority-0.1317240 %78 %
154Percentage of DoFollow External Links   Authority-0.13241167 %84 %
155Number of Questions In H2 Tags   Size-0.134121 %80 %
156Has FavIcon   Technology-0.131170 %73 %
157Number of Prices   Size-0.133919965 %80 %
158Number of Email Addresses   Trust-0.1358437 %82 %
159Is Article Page   Other-0.131139 %72 %
160Uses JSON-LD ListItem   Other-0.131131 %77 %
161Uses JSON-LD BreadcrumbList   Other-0.131131 %76 %
162Variations Making Whole Span Tags   Relevancy-0.139116 %85 %
163Exact Matches in Sentences   Relevancy-0.1348319 %88 %
164Number of Nofollow Links   Authority-0.1318422 %82 %
165Is OpenGraph Type Article   Technology-0.131129 %66 %
166Inline JavaScript Kilobytes   Size-0.1352415775 %72 %
167Number Of Claimed Brands   Other-0.1320222 %78 %
168Uses Schema listitem   Other-0.131139 %70 %
169Uses Schema description   Other-0.131145 %70 %
170Uses Schema breadcrumblist   Other-0.121139 %70 %
171Variations in the last 100 words   Relevancy-0.12175440 %83 %
172Uses JSON-LD datePublished   Other-0.121130 %66 %
173Exact Matches in Title Tag   Relevancy-0.122115 %85 %
174Exact Matches in Top 30KB   Relevancy-0.1219115 %84 %
175Uses JSON-LD Organization   Other-0.121128 %76 %
176Variations in Meta Twitter Description   Relevancy-0.1220122 %74 %
177Uses Schema datemodified   Other-0.121128 %62 %
178Uses JSON-LD ImageObject   Other-0.121129 %67 %
179Number of Questions In H3 Tags   Size-0.127116 %77 %
180Has Email   Trust-0.121137 %74 %
181Uses Schema website   Other-0.121129 %66 %
182Uses Schema unitcode   Other-0.12114 %16 %
183Uses Schema organization   Other-0.121131 %73 %
184Variations in TITLE Attributes   Relevancy-0.125631033 %82 %
185Variations in I Tags   Relevancy-0.12394518 %82 %
186Percentage of NoFollow Links   Authority-0.1215220 %79 %
187Uses JSON-LD dateModified   Other-0.121127 %66 %
188Is Pagination Page   Other-0.121117 %68 %
189Number of Twitter Accounts   Authority-0.122120 %78 %
190Variations in Meta Twitter Content   Relevancy-0.125124 %72 %
191Has Meta Robots   Other-0.121122 %75 %
192Has Terms of Service   Trust-0.121137 %73 %
193Uses Schema item   Other-0.121129 %61 %
194Uses Schema product   Other-0.121110 %50 %
195Uses JSON-LD WebSite   Other-0.121126 %72 %
196Uses JSON-LD unitCode   Other-0.12114 %16 %
197Uses Schema imageobject   Other-0.121136 %60 %
198Leading Variations in H3 Tags   Relevancy-0.1210112 %79 %
199Uses Schema webpage   Other-0.121131 %67 %
200Variations in Article Tags   Relevancy-0.1213381621 %82 %