Measures 146908 SEO Factors

145186 Built-In SEO Factors

136037 On-page SEO Factors

9149 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 2025-12     previous

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

NameCorrelation#1 MaxPage 1 AvgUsage %Searches %
1Number of Referring Domains   Authority-0.23231918651 %71 %
2Number of Backlinks   Authority-0.227703121662451 %73 %
3Entities in Title Tag   Relevancy-0.217379 %96 %
4Number of Do Follow Backlinks   Authority-0.217158341486547 %74 %
5Number of No Follow Backlinks   Authority-0.2154478174240 %70 %
6Entities in H1 Tags-0.217367 %93 %
7Number of Top 100 Shared Factors Used   Diversity-0.21392998 %86 %
8Number of Unique Variations Used   Diversity-0.2118676 %80 %
9Number of Unique LSI Words Used   Diversity-0.2195733286 %84 %
10Number of Top 50 Shared Factors Used   Diversity-0.2161297 %89 %
11Number of Top 200 Shared Factors Used   Diversity-0.2523998 %89 %
12Search Result Domain is .com, .net, or .org   Other-0.2114 %54 %
13Number of Distinct Entities Used   Diversity-0.2623486 %96 %
14Load Time Milliseconds   Performance-0.194070114786 %86 %
15Entities in Sentences   Relevancy-0.1946116180 %91 %
16Entities in the HTML Tag   Relevancy-0.1946616783 %91 %
17Variations in Search Result Document File Name   Relevancy-0.185145 %61 %
18Variations in Search Result Display URL   Relevancy-0.1811271 %73 %
19Variations in Search Result Link Text   Relevancy-0.1811271 %73 %
20Variations in H1-H6 Tags   Relevancy-0.1847660 %79 %
21Variations in H1, H2, and H3 Tags   Relevancy-0.1841560 %81 %
22Variations in H1 and H2 Tags   Relevancy-0.1829457 %79 %
23Exact Matches in the HTML Tag   Relevancy-0.181541234 %74 %
24Entities in H2 Tags-0.1830862 %94 %
25Number of Factors Used   Diversity-0.1827017698 %83 %
26Variations in P Tags   Relevancy-0.179873264 %79 %
27Entities in Meta Description Tag   Relevancy-0.178467 %91 %
28LSI Words in H1 Tags   Relevancy-0.1712566 %93 %
29Is Home Page   Other-0.171123 %44 %
30Variation Count in Top 30KB   Relevancy-0.1739864364 %83 %
31Variations in Body Tags   Relevancy-0.177905871476 %81 %
32Variations in HTML Tags   Relevancy-0.177905871476 %81 %
33Variations in Div Tags   Relevancy-0.171530919071 %79 %
34Variations in Sentences   Relevancy-0.1734105470 %80 %
35Entities in H3 Tags-0.1721752 %90 %
36Variations in LI Tags   Relevancy-0.17591863 %79 %
37Variations in the Title Tag   Relevancy-0.179261 %78 %
38Has Entities in H1 Tags   Relevancy-0.171168 %89 %
39Term Frequency   Relevancy-0.175375 %83 %
40LSI Words in Title Tag   Relevancy-0.1711676 %93 %
41Variations in Meta Description   Relevancy-0.1743251 %78 %
42Search Result Domain is .com   Other-0.17114 %52 %
43Variations in H1 Tags   Relevancy-0.177152 %86 %
44LSI Words in Sentences   Relevancy-0.16232879673 %89 %
45Leading Variations in H1, H2, and H3 Tags   Relevancy-0.165240 %79 %
46Number of H1 Tags   Size-0.163274 %88 %
47Search Result Number of Dirs in Path   Other-0.163275 %71 %
48Title Tag Has Entities   Relevancy-0.161179 %85 %
49Percentage of DoFollow Links   Authority-0.16998583 %88 %
50Exact Matches in Top 30KB   Relevancy-0.1616222 %73 %
51Leading Variations in H1-H6 Tags   Relevancy-0.166242 %79 %
52Word Count   Size-0.162719141386 %81 %
53Unabridged Word Count   Size-0.163297179386 %82 %
54Exact Matches in H1-H6 Tags   Relevancy-0.156124 %75 %
55Variations in H2 Tags   Relevancy-0.1522344 %77 %
56Clean Keyword Density in the HTML Tag   Relevancy-0.15147467 %69 %
57Variations in Span Tags   Relevancy-0.154961148 %78 %
58Exact Matches in Sentences   Relevancy-0.1519324 %71 %
59Variations in OpenGraph Title   Relevancy-0.156148 %72 %
60Variations in OpenGraph Description   Relevancy-0.1538245 %71 %
61Clean Text Kilobytes   Size-0.15231279 %81 %
62Variations in ALT Attributes   Relevancy-0.15342740 %72 %
63Percentage of DoFollow Internal Links   Authority-0.15907582 %84 %
64Variations in Search Result URL Path   Relevancy-0.156140 %79 %
65Uses Schema medicalwebpage   Other-0.15118 %19 %
66Uses JSON-LD MedicalWebPage   Other-0.15117 %20 %
67Has Entities in H3 Tags   Relevancy-0.151153 %74 %
68Has Entities in H2 Tags   Relevancy-0.151162 %86 %
69Number of Images   Size-0.151282879 %82 %
70Number of P Tags   Size-0.15783678 %85 %
71Number of H2 Tags   Size-0.1513772 %88 %
72Leading Variations in Title Tag   Relevancy-0.151130 %74 %
73Number of DoFollow External Links   Authority-0.15381379 %86 %
74Has Meta Charset   Technology-0.151177 %82 %
75LSI Words in Meta Description Tag   Relevancy-0.15271263 %89 %
76Variations in A Tags   Relevancy-0.1418803163 %78 %
77Number of Heading Tags   Size-0.14352179 %83 %
78Leading Variations in H1 Tags   Relevancy-0.141126 %80 %
79Variations in Section Tags   Relevancy-0.1415602734 %74 %
80Number of HTML Tags   Size-0.142661102887 %82 %
81Has JSON-LD Schema Markup   Relevancy-0.141154 %63 %
82Average Words Per Sentence   Size-0.14813181 %78 %
83Number of Images with ALT Text   Size-0.141051975 %84 %
84Exact Matches in Title Tag   Relevancy-0.141122 %69 %
85Meta Description Tag Has Entities   Relevancy-0.141167 %73 %
86Number of HTML Comments   Size-0.142194175 %88 %
87Variations in Search Result URL   Relevancy-0.143144 %74 %
88Variation Density in Top 30KB   Relevancy-0.14247458 %71 %
89Number of External Links   Authority-0.14461580 %85 %
90Variations in Main Tags   Relevancy-0.1489949635 %83 %
91LSI Words in H2 Tags   Relevancy-0.14792163 %91 %
92Number of DoFollow Links   Authority-0.1431115384 %83 %
93Number of HTTPS Links   Authority-0.1432015483 %83 %
94Variations making whole H1-H6 Tags   Relevancy-0.141116 %77 %
95Number of Internal Links   Authority-0.1428314183 %83 %
96Number of Sentences   Size-0.1428812184 %74 %
97Flesch Kincaid Reading Grade Level   Other-0.146294 %87 %
98Variations making whole A Tags   Relevancy-0.1417126 %71 %
99Has Canonical URL   Authority-0.141174 %70 %
100Number of Includes   Technology-0.13402684 %70 %
101Variations in Script Tags   Relevancy-0.134632337259 %82 %
102Number of Links   Authority-0.1332115683 %84 %
103Is OpenGraph Type Article   Technology-0.131135 %44 %
104Has Meta Viewport   Technology-0.131184 %81 %
105Number of H3 Tags   Size-0.1323863 %80 %
106Variations in H3 Tags   Relevancy-0.1313233 %76 %
107Number of JavaScript Includes   Technology-0.13281784 %73 %
108Number Of JSON-LD Types   Relevancy-0.13371257 %65 %
109Number of Facebook Pages   Authority-0.135263 %69 %
110Variations making whole H1, H2, and H3 Tags   Relevancy-0.131116 %78 %
111Uses JSON-LD name   Other-0.131155 %63 %
112Percentage of DoFollow External Links   Authority-0.13201178 %85 %
113Search Result Uses HTTPS   Other-0.131186 %81 %
114Exact Matches in H1 Tags   Relevancy-0.132117 %76 %
115LSI Words in H3 Tags   Relevancy-0.13672154 %86 %
116Search Result URL Length   Size-0.13786299 %56 %
117TF/IDF   Relevancy-0.131153 %79 %
118Has FavIcon   Technology-0.131178 %79 %
119Variations in First 100 Words   Relevancy-0.13102555 %78 %
120Has Schema Markup   Relevancy-0.131165 %64 %
121Uses JSON-LD publisher   Other-0.13112 %11 %
122Variations making whole H1 Tags   Relevancy-0.13119 %75 %
123Search Result Domain Length   Size-0.13261887 %77 %
124Search Result Host Length   Size-0.13261887 %77 %
125Number of Social Accounts   Authority-0.133244 %80 %
126Variations in the Canonical URL   Relevancy-0.1321142 %73 %
127Number of Questions In Headings   Size-0.136239 %73 %
128Has Form   Technology-0.131153 %71 %
129Inline CSS Kilobytes   Size-0.131455865 %65 %
130Number of LinkedIn Pages   Authority-0.133131 %68 %
131Has Privacy Policy   Trust-0.131161 %59 %
132Uses Schema description   Other-0.131152 %44 %
133Word Count in Meta Description   Size-0.13482069 %78 %
134Entities in H4 Tags-0.1310324 %76 %
135Number of Images without ALT Text   Size-0.13371059 %77 %
136Variations in Distinct A Tag HREF Attributes   Relevancy-0.128052653 %83 %
137Title Word Count   Size-0.1212884 %71 %
138Uses JSON-LD description   Other-0.121146 %55 %
139Variations in A Tag HREF Attributes   Relevancy-0.1210093852 %81 %
140Uses JSON-LD BreadcrumbList   Other-0.121137 %61 %
141Number of Forms   Technology-0.129255 %74 %
142Has Meta Description   Relevancy-0.121169 %76 %
143Has OpenGraph Type   Relevancy-0.121162 %67 %
144Variations in Nav Tags   Relevancy-0.1212533044 %78 %
145Variations in Absolute URLs   Relevancy-0.1270498952 %79 %
146Uses JSON-LD ListItem   Other-0.121139 %62 %
147Has Contact Page   Trust-0.121167 %67 %
148Has Meta Twitter Card   Authority-0.121154 %58 %
149Number of YouTube Accounts   Technology-0.121110 %69 %
150Uses Schema website   Other-0.121141 %51 %
151Uses Schema organization   Other-0.121135 %62 %
152Variations Making Whole LI Tags   Relevancy-0.123122 %71 %
153Meta Description Length   Size-0.1228012070 %78 %
154Number of Absolute URLs   Authority-0.1253225385 %73 %
155Uses JSON-LD url   Other-0.121146 %65 %
156Search Result Summary Has Year   Other-0.121118 %53 %
157Uses Schema cssselector   Other-0.12111 %13 %
158Leading Variations in H2 Tags   Relevancy-0.123119 %80 %
159Uses Schema name   Other-0.121163 %58 %
160Title Length   Size-0.12674984 %72 %
161Number of Nofollow Links   Authority-0.1216425 %74 %
162Exact Matches in Meta Description   Relevancy-0.122113 %74 %
163Number of Social Pages   Authority-0.1214467 %74 %
164Has US Phone Number   Trust-0.121138 %53 %
165Variations Making Whole Span Tags   Relevancy-0.123118 %76 %
166Number of Facebook Accounts   Authority-0.123130 %78 %
167Number of Meta Generator Tags   Technology-0.122139 %54 %
168Number of CSS Includes   Technology-0.12171077 %74 %
169Uses JSON-LD Organization   Other-0.121132 %67 %
170Variations in TITLE Attributes   Relevancy-0.1222534 %75 %
171Uses JSON-LD author   Other-0.12111 %27 %
172Is Article Page   Other-0.121144 %63 %
173Has XMLRPC   Technology-0.121134 %48 %
174Uses Schema webpageelement   Other-0.12112 %19 %
175Uses Microdata reviewRating   Other-0.12112 %19 %
176Uses Schema reviewrating   Other-0.12112 %19 %
177Uses JSON-LD datePublished   Other-0.121138 %54 %
178Uses JSON-LD WebPageElement   Other-0.12112 %18 %
179Number of Questions In H3 Tags   Size-0.113117 %71 %
180Has Terms of Service   Trust-0.111134 %60 %
181Percentage of NoFollow Links   Authority-0.114222 %68 %
182Number of Questions   Size-0.11251071 %69 %
183Has RSS Link   Authority-0.111133 %50 %
184Exact Matches in H2 Tags   Relevancy-0.113113 %73 %
185Uses JSON-LD cssSelector   Other-0.11111 %13 %
186Has HREF Lang   Technology-0.111112 %66 %
187Number of Questions In H2 Tags   Size-0.114124 %76 %
188Uses RDFa stylesheet   Other-0.11112 %19 %
189Uses Schema stylesheet   Other-0.11112 %19 %
190Search Result Summary Length   Size-0.1116015298 %63 %
191Uses Microdata Rating   Other-0.11112 %21 %
192Number of US Phone Numbers   Trust-0.1152938 %71 %
193Variations in Strong Tags   Relevancy-0.118223 %71 %
194Uses Schema image   Other-0.111122 %52 %
195Uses Schema listitem   Other-0.111146 %53 %
196Uses Schema searchaction   Other-0.111131 %49 %
197Exact Matches in A Tags   Relevancy-0.1123218 %72 %
198Uses JSON-LD item   Other-0.111124 %50 %
199Headings Has Question   Other-0.111138 %68 %
200Uses Schema sku   Other-0.11114 %31 %