Measures 149788 SEO Factors

148066 Built-In SEO Factors

138889 On-page SEO Factors

9177 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 2019-9     previous - today - next

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

NameCorrelation#1 MaxPage 1 AvgUsage %Searches %
1Number of Factors Used   Diversity-0.3220411895 %89 %
2Variations in HTML Tags   Relevancy-0.28167624488 %95 %
3Term Frequency   Relevancy-0.278688 %92 %
4Variations in Body Tags   Relevancy-0.27158620385 %94 %
5Variations in Sentences   Relevancy-0.262936487 %93 %
6Variations in Div Tags   Relevancy-0.26112813886 %91 %
7Variations in A Tag HREF Attributes   Relevancy-0.254735980 %92 %
8Ahrefs Rank   Authority-0.25331894 %13 %
9Variations in A Tags   Relevancy-0.252553282 %93 %
10Ahrefs Referring Class C Addresses   Authority-0.246754360 %17 %
11Ahrefs Referring IP Addresses   Authority-0.2410005260 %18 %
12Variations in H1-H6 Tags   Relevancy-0.2330983 %91 %
13Ahrefs Referring Domains   Authority-0.2321046860 %18 %
14Variations in P Tags   Relevancy-0.232023780 %92 %
15Variations in Absolute URLs   Relevancy-0.235137079 %91 %
16Variations in LI Tags   Relevancy-0.231592480 %92 %
17Variations in H1, H2, and H3 Tags   Relevancy-0.2328782 %90 %
18Ahrefs NoFollow Backlinks   Authority-0.225408392347 %17 %
19Clean Text Kilobytes   Size-0.22421188 %80 %
20Search Result Number of Site Links   Other-0.22112 %59 %
21Ahrefs Text Backlinks   Authority-0.22720238972159 %17 %
22Exact Matches in Sentences   Relevancy-0.2262644 %82 %
23Ahrefs Referring Pages   Authority-0.22720247972660 %17 %
24Ahrefs Backlinks   Authority-0.22720247970160 %17 %
25Exact Matches in Body Tag   Relevancy-0.222982146 %83 %
26Exact Matches in the HTML Tag   Relevancy-0.223381547 %83 %
27Word Count   Size-0.225860146293 %81 %
28Unabridged Word Count   Size-0.227764182093 %80 %
29Keywords in pages top 10 most used phrases-0.215275 %87 %
30Variations in H1 and H2 Tags   Relevancy-0.2125580 %88 %
31Number of Sentences   Size-0.214127192 %82 %
32Ahrefs Dofollow Backlinks   Authority-0.21716870895552 %17 %
33Keywords in pages top 5 most used phrases-0.23266 %86 %
34Variations in Search Result URL   Relevancy-0.25270 %78 %
35Variations in Script Tags   Relevancy-0.24444366 %91 %
36Variations in Search Result URL Path   Relevancy-0.25268 %76 %
37Variations in Search Result Display URL   Relevancy-0.24289 %76 %
38Variations in Search Result Link Text   Relevancy-0.24289 %76 %
39Ahrefs Has NoFollow Backlinks   Authority-0.21147 %18 %
40Number of HTTPS Links   Authority-0.260614989 %84 %
41TF/IDF   Relevancy-0.21176 %76 %
42Number of HTML Tags   Size-0.2326099395 %82 %
43Ahrefs Domain Rating   Authority-0.2835192 %14 %
44Exact Matches in H1-H6 Tags   Relevancy-0.1910235 %76 %
45Variations in Span Tags   Relevancy-0.19581161 %89 %
46Keywords in pages top 3 most used phrases-0.193156 %83 %
47Variations in First 100 Words   Relevancy-0.1923874 %77 %
48Leading Variations in H1-H6 Tags   Relevancy-0.1911255 %87 %
49Ahrefs Word Count   Size-0.193397138570 %16 %
50Ahrefs Has Text Backlinks   Authority-0.191158 %17 %
51Number of P Tags   Size-0.193563989 %82 %
52Variations in ALT Attributes   Relevancy-0.1973854 %89 %
53Variations in the Title Tag   Relevancy-0.1912285 %74 %
54Ahrefs Has Dofollow Backlinks   Authority-0.191151 %16 %
55Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1910252 %86 %
56Variations in H2 Tags   Relevancy-0.1923350 %89 %
57Ahrefs Has Backlinks   Authority-0.191159 %18 %
58Variations in the Canonical URL   Relevancy-0.195256 %81 %
59Number of Heading Tags   Size-0.18582291 %82 %
60Variations in Search Result Document File Name   Relevancy-0.185263 %69 %
61Variations in Meta Description   Relevancy-0.186264 %85 %
62Exact Matches in A Tags   Relevancy-0.1841430 %74 %
63Body Tag Size Kilobytes   Size-0.1845711291 %82 %
64Number of Links   Authority-0.1860916293 %82 %
65Ahrefs Internal Links   Authority-0.184778669 %18 %
66Exact Matches in Title Tag   Relevancy-0.182133 %68 %
67Page Size Kilobytes   Size-0.1749816095 %83 %
68Number of DoFollow Links   Authority-0.1760215593 %82 %
69Number of Internal Links   Authority-0.1757814292 %82 %
70Variations in H3 Tags   Relevancy-0.1715338 %86 %
71Ahrefs Page Size   Size-0.17494392534571 %14 %
72Variations in the last 100 words   Relevancy-0.1716564 %74 %
73Variations in H1 Tags   Relevancy-0.175271 %80 %
74Number of Images   Size-0.171523191 %82 %
75Number of Images with ALT Text   Size-0.171281985 %82 %
76Number of External Links   Authority-0.17832187 %78 %
77Variations in Nav Tags   Relevancy-0.171992147 %84 %
78Search Result Has Rewritten Page Title   Other-0.171190 %27 %
79Exact Matches in H1 Tags   Relevancy-0.172127 %68 %
80Load Time Milliseconds   Performance-0.1755125378695 %73 %
81Ahrefs Images   Relevancy-0.16632068 %14 %
82Search Result Uses HTTPS   Other-0.161184 %75 %
83Leading Variations in H1 Tags   Relevancy-0.162135 %78 %
84Leading Variations in Title Tag   Relevancy-0.161141 %75 %
85Ahrefs Pages   Size-0.165271 %15 %
86Number of Absolute URLs   Authority-0.1680020094 %81 %
87Inline JavaScript Kilobytes   Size-0.162944190 %79 %
88Title Has Best   Other-0.161117 %56 %
89Variations making whole A Tags   Relevancy-0.1610238 %84 %
90Average Words Per Sentence   Size-0.161553787 %65 %
91Number of DoFollow External Links   Authority-0.16511785 %73 %
92Variations in Summary Tags   Relevancy-0.161701951 %83 %
93Number of H3 Tags   Size-0.1635869 %80 %
94Ahrefs Linked Root Domains   Authority-0.1617870 %18 %
95Variations Making Whole LI Tags   Relevancy-0.1611128 %81 %
96Variations Making Whole Span Tags   Relevancy-0.1615123 %81 %
97Ahrefs Image Backlinks-0.161767662122 %15 %
98Number of H2 Tags   Size-0.1619773 %82 %
99Flesch Kincaid Reading Grade Level   Other-0.16971789 %64 %
100Exact Matches in Meta Description   Relevancy-0.162121 %66 %
101Ahrefs Has Image Backlinks   Authority-0.161123 %14 %
102Ahrefs External Links   Authority-0.16481663 %18 %
103Title Has Sentiment Words   Other-0.161121 %65 %
104Exact Matches in H2 Tags   Relevancy-0.165116 %66 %
105Variations in TITLE Attributes   Relevancy-0.16128949 %85 %
106Variations in Strong Tags   Relevancy-0.1515334 %83 %
107Title Has Sales Words   Other-0.151121 %66 %
108Variations in OpenGraph Title   Relevancy-0.1512255 %69 %
109Variations in Footer Tags   Relevancy-0.1585738 %79 %
110Flesch Kincaid Reading Ease   -0.151376790 %66 %
111Variations in Class Attributes   Relevancy-0.15180730 %77 %
112Keywords in pages most used phrase-0.151130 %73 %
113Variations in Article Tags   Relevancy-0.151972534 %76 %
114Ahrefs Has Images   Other-0.151167 %13 %
115Variations in OpenGraph Description   Relevancy-0.1511249 %77 %
116Leading Variations in H2 Tags   Relevancy-0.156123 %83 %
117Ahrefs Has Internal Links   Authority-0.151168 %15 %
118Ahrefs Has External Links   Authority-0.151162 %16 %
119Ahrefs Has Linked Root Domains   Authority-0.151168 %16 %
120Number of US Phone Numbers   Trust-0.1596946 %74 %
121Variations in I Tags   Relevancy-0.1552323 %82 %
122Variations making whole H1-H6 Tags   Relevancy-0.154118 %74 %
123Variations in Section Tags   Relevancy-0.15991737 %83 %
124Number of Social Pages   Authority-0.1521251 %70 %
125Variations in ID Attributes   Relevancy-0.1512215 %80 %
126Has Privacy Policy   Trust-0.151164 %75 %
127Number of Social Accounts   Authority-0.159359 %73 %
128Has Terms of Service   Trust-0.141144 %68 %
129Has Canonical URL   Authority-0.141174 %71 %
130Number of Nofollow Links   Authority-0.14129840 %80 %
131Number of NoFollow External Links   Authority-0.1435428 %80 %
132Head Size Kilobytes   Size-0.142904493 %78 %
133Search Result Link Text Has Year   Other-0.141112 %50 %
134Variations in Host Citations   Relevancy-0.14162613 %64 %
135Variations making whole H1, H2, and H3 Tags   Relevancy-0.142117 %73 %
136Variations in Main Tags   Relevancy-0.142564326 %77 %
137Word Count in Meta Description   Size-0.14762271 %77 %
138Title Has Year   Other-0.141112 %57 %
139Meta Description Length   Size-0.1449713271 %77 %
140Variations in H4 Tags   Relevancy-0.1417219 %82 %
141Variations in H4-H6 Tags   Relevancy-0.1418223 %82 %
142Number of Email Addresses   Trust-0.1439337 %68 %
143Search Result Link Text Length   Size-0.14897895 %64 %
144Number of H4 Tags   Size-0.1449547 %77 %
145Number of Twitter Accounts   Authority-0.145150 %70 %
146Variations in Meta Twitter Description   Relevancy-0.1310233 %71 %
147Number of HREF Lang Tags   Size-0.1314210 %71 %
148Exact Matches making whole H1-H6 Tags   Relevancy-0.13219 %52 %
149Variations making whole H1 Tags   Relevancy-0.131112 %68 %
150Variations in Meta Twitter Content   Relevancy-0.1312136 %66 %
151Leading Variations in H3 Tags   Relevancy-0.134116 %78 %
152Ahrefs Has Domain Rating   Authority-0.131189 %11 %
153Has Email   Trust-0.131136 %53 %
154Has JSON-LD Schema Markup   Relevancy-0.131130 %60 %
155Percentage of DoFollow External Links   Authority-0.13731484 %56 %
156Variations in Search Result Summary   Relevancy-0.137392 %67 %
157Exact Matches in H3 Tags   Relevancy-0.13319 %54 %
158Number of Images without ALT Text   Size-0.13571274 %75 %
159Search Result Has Schema   Other-0.13117 %52 %
160Percentage of NoFollow Links   Authority-0.1322538 %73 %
161Variations in Value Attributes   Relevancy-0.1366215 %75 %
162Ahrefs Has Redirects   Authority-0.131113 %12 %
163Percentage of NoFollow External Links   Authority-0.1319326 %74 %
164Variations in Search Result URL Host Name   Relevancy-0.13214 %47 %
165Variations in Search Result URL Domain Name   Relevancy-0.13214 %47 %
166Exact Matches making whole H1, H2, and H3 Tags   Relevancy-0.13219 %52 %
167Has FavIcon   Technology-0.131173 %65 %
168Ahrefs Redirects   Authority-0.1347313 %14 %
169Number of Ads   Technology-0.1312213 %54 %
170Exact Matches making whole A Tags   Relevancy-0.133110 %50 %
171Search Result Publish Date-0.132013218320196378649495 %44 %
172Number of Amazon Ads   Technology-0.1312213 %54 %
173Variations in HTML Comment Tags   Relevancy-0.1385412 %72 %
174Variations in Button Tags   Relevancy-0.1310115 %61 %
175Exact Matches making whole H1 Tags   Relevancy-0.13118 %50 %
176Has Rel Next Link   Authority-0.13118 %58 %
177Number of Facebook Accounts   Authority-0.134137 %72 %
178Has Rel Pagination   Authority-0.13118 %57 %
179Number of CSS Includes   Technology-0.1318886 %55 %
180Has OpenGraph Image   Relevancy-0.131149 %63 %
181Inline CSS Kilobytes   Size-0.132063153 %73 %
182Has Meta Description   Relevancy-0.131172 %72 %
183Search Result Has Rating   Other-0.13117 %49 %
184Has JSON-LD ImageObject-0.131127 %55 %
185Number of Forms   Technology-0.1314374 %70 %
186Has Ads   Other-0.121113 %50 %
187Has HREF Lang   Technology-0.121111 %64 %
188Has JSON-LD Organization-0.121128 %54 %
189Number of Instagram Pages   Authority-0.1217234 %66 %
190Search Result Summary Length   Size-0.12116228095 %65 %
191Number of HTML Comments   Size-0.125593786 %67 %
192Has Apple Touch Icon   Technology-0.121141 %66 %
193Variations in OpenGraph Site Name   Relevancy-0.122115 %59 %
194Has Contact Page   Trust-0.121169 %56 %
195Variations in Form Tags   Relevancy-0.127113 %71 %
196Aggressive Variation Density   Relevancy-0.121219 %63 %
197Title Word Count   Size-0.1253994 %58 %
198Has Amazon Ads   Other-0.121114 %49 %
199Has JSON-LD WebPage-0.121127 %53 %
200Variations in Style Tags   Relevancy-0.12344815 %69 %