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 2019-6     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-0.3220010994 %83 %
2Ahrefs Rank   Authority-0.27461794 %12 %
3Variations in HTML Tags   Relevancy-0.26176322587 %90 %
4Term Frequency   Relevancy-0.268687 %88 %
5Variations in Body Tags   Relevancy-0.25154518684 %90 %
6Variations in Sentences   Relevancy-0.254325785 %89 %
7Ahrefs Referring Class C Addresses   Authority-0.2517264656 %18 %
8Ahrefs Referring IP Addresses   Authority-0.2528036656 %18 %
9Ahrefs Referring Domains   Authority-0.241655618556 %18 %
10Variations in Div Tags   Relevancy-0.2494412484 %84 %
11Ahrefs Text Backlinks   Authority-0.2324034491543456 %18 %
12Ahrefs Backlinks   Authority-0.2324034741550957 %18 %
13Ahrefs Referring Pages   Authority-0.2324034691553257 %18 %
14Variations in A Tag HREF Attributes   Relevancy-0.237495577 %86 %
15Ahrefs NoFollow Backlinks   Authority-0.2310322771746 %19 %
16Variations in H1-H6 Tags   Relevancy-0.2368879 %88 %
17Variations in A Tags   Relevancy-0.232412979 %87 %
18Variations in P Tags   Relevancy-0.222363177 %88 %
19Variations in H1, H2, and H3 Tags   Relevancy-0.2260778 %88 %
20Search Result Number of Site Links   Other-0.22212 %52 %
21Ahrefs Dofollow Backlinks   Authority-0.2223002221494649 %18 %
22Variations in Absolute URLs   Relevancy-0.215376476 %88 %
23Keywords in pages top 10 most used phrases-0.216269 %83 %
24Variations in LI Tags   Relevancy-0.212382177 %87 %
25Variations in H1 and H2 Tags   Relevancy-0.2128475 %87 %
26Ahrefs Has Text Backlinks   Authority-0.211155 %18 %
27Variations in Search Result Link Text   Relevancy-0.215287 %78 %
28Variations in First 100 Words   Relevancy-0.2130870 %76 %
29Variations in Search Result Display URL   Relevancy-0.215287 %78 %
30Ahrefs Has Backlinks   Authority-0.21156 %18 %
31TF/IDF   Relevancy-0.21172 %76 %
32Ahrefs Has Dofollow Backlinks   Authority-0.21148 %17 %
33Variations in Search Result URL Path   Relevancy-0.25263 %70 %
34Variations in Search Result URL   Relevancy-0.25266 %71 %
35Ahrefs Has NoFollow Backlinks   Authority-0.21146 %18 %
36Variations in the Title Tag   Relevancy-0.25282 %75 %
37Clean Text Kilobytes   Size-0.2501187 %79 %
38Keywords in pages top 5 most used phrases-0.24259 %82 %
39Exact Matches in the HTML Tag   Relevancy-0.23691238 %80 %
40Exact Matches in Body Tag   Relevancy-0.23331537 %81 %
41Exact Matches in Sentences   Relevancy-0.194351635 %79 %
42Variations in Script Tags   Relevancy-0.195984162 %88 %
43Number of Sentences   Size-0.193736690 %80 %
44Leading Variations in H1-H6 Tags   Relevancy-0.1929251 %84 %
45Word Count   Size-0.194834135491 %79 %
46Unabridged Word Count   Size-0.1910070173991 %78 %
47Variations in Meta Description   Relevancy-0.1911261 %83 %
48Variations in the Canonical URL   Relevancy-0.195252 %74 %
49Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1928248 %83 %
50Ahrefs Word Count   Size-0.194044130468 %11 %
51Keywords in pages top 3 most used phrases-0.183151 %79 %
52Variations in Search Result Document File Name   Relevancy-0.185258 %69 %
53Number of P Tags   Size-0.181513687 %76 %
54Variations in Span Tags   Relevancy-0.181941059 %85 %
55Variations in H2 Tags   Relevancy-0.1822346 %86 %
56Variations in H1 Tags   Relevancy-0.1813267 %78 %
57Exact Matches in H1-H6 Tags   Relevancy-0.18375227 %74 %
58Number of HTTPS Links   Authority-0.1856113787 %78 %
59Number of HTML Tags   Size-0.18333496494 %74 %
60Number of Heading Tags   Size-0.171792189 %76 %
61Variations in ALT Attributes   Relevancy-0.17250748 %86 %
62Variations in the last 100 words   Relevancy-0.1722559 %74 %
63Body Tag Size Kilobytes   Size-0.1764211189 %81 %
64Ahrefs Image Backlinks-0.17471657320821 %16 %
65Variations in H3 Tags   Relevancy-0.1737335 %85 %
66Ahrefs Has Image Backlinks   Authority-0.171122 %15 %
67Page Size Kilobytes   Size-0.1783015993 %79 %
68Number of Links   Authority-0.1756815591 %74 %
69Ahrefs Internal Links   Authority-0.162607267 %17 %
70Number of DoFollow Links   Authority-0.1654814891 %73 %
71Variations in OpenGraph Title   Relevancy-0.164150 %72 %
72Number of Absolute URLs   Authority-0.1668719092 %76 %
73Variations in OpenGraph Description   Relevancy-0.169244 %76 %
74Ahrefs External Links   Authority-0.161291763 %18 %
75Number of Internal Links   Authority-0.1653913690 %74 %
76Number of Images   Size-0.161292989 %77 %
77Leading Variations in Title Tag   Relevancy-0.161137 %73 %
78Ahrefs Linked Root Domains   Authority-0.1625768 %18 %
79Inline JavaScript Kilobytes   Size-0.166404387 %77 %
80Variations in Nav Tags   Relevancy-0.163421742 %75 %
81Number of External Links   Authority-0.162132086 %75 %
82Variations making whole A Tags   Relevancy-0.1625236 %75 %
83Leading Variations in H1 Tags   Relevancy-0.163132 %73 %
84Title Has Sentiment Words   Other-0.161120 %66 %
85Number of Images with ALT Text   Size-0.161071782 %78 %
86Number of H3 Tags   Size-0.16138867 %74 %
87Variations in Summary Tags   Relevancy-0.162461646 %75 %
88Exact Matches in Title Tag   Relevancy-0.1687125 %67 %
89Title Has Best   Other-0.161116 %59 %
90Exact Matches in A Tags   Relevancy-0.163722425 %71 %
91Ahrefs Pages   Size-0.155270 %17 %
92Average Words Per Sentence   Size-0.152293687 %62 %
93Title Has Sales Words   Other-0.151119 %64 %
94Variations Making Whole LI Tags   Relevancy-0.1514127 %71 %
95Exact Matches in H1 Tags   Relevancy-0.152120 %64 %
96Variations Making Whole Span Tags   Relevancy-0.15179222 %77 %
97Exact Matches in H2 Tags   Relevancy-0.15141113 %62 %
98Leading Variations in H2 Tags   Relevancy-0.156122 %79 %
99Flesch Kincaid Reading Grade Level   Other-0.15941790 %60 %
100Variations in Article Tags   Relevancy-0.152412031 %72 %
101Number of H2 Tags   Size-0.1533672 %74 %
102Variations in Footer Tags   Relevancy-0.1562634 %75 %
103Head Size Kilobytes   Size-0.153574591 %75 %
104Number of Email Addresses   Trust-0.15486436 %67 %
105Ahrefs Has External Links   Authority-0.151161 %16 %
106Ahrefs Has Internal Links   Authority-0.151166 %15 %
107Ahrefs Has Linked Root Domains   Authority-0.151167 %15 %
108Variations in Class Attributes   Relevancy-0.15231827 %76 %
109Variations in Strong Tags   Relevancy-0.1547331 %79 %
110Load Time Milliseconds   Performance-0.15183737424295 %67 %
111Number of DoFollow External Links   Authority-0.152101784 %72 %
112Keywords in pages most used phrase-0.152126 %70 %
113Exact Matches in Meta Description   Relevancy-0.15141117 %62 %
114Variations in Meta Twitter Description   Relevancy-0.158128 %72 %
115Variations in TITLE Attributes   Relevancy-0.15147744 %81 %
116Number of Social Accounts   Authority-0.1530356 %68 %
117Has Email   Trust-0.151136 %56 %
118Flesch Kincaid Reading Ease   -0.142076991 %67 %
119Variations in Search Result Summary   Relevancy-0.149390 %70 %
120Variations in Meta Twitter Content   Relevancy-0.143131 %69 %
121Number of Social Pages   Authority-0.1447249 %70 %
122Number of US Phone Numbers   Trust-0.14231841 %72 %
123Variations making whole H1-H6 Tags   Relevancy-0.1424116 %71 %
124Search Result Uses HTTPS   Other-0.141181 %70 %
125Number of NoFollow External Links   Authority-0.1487426 %76 %
126Meta Description Length   Size-0.1473312770 %73 %
127Word Count in Meta Description   Size-0.141062170 %76 %
128Has Canonical URL   Authority-0.141169 %67 %
129Title Has Year   Other-0.141111 %58 %
130Variations in I Tags   Relevancy-0.1434323 %79 %
131Number of Nofollow Links   Authority-0.1493839 %75 %
132Variations in Section Tags   Relevancy-0.141681433 %79 %
133Variations in H4-H6 Tags   Relevancy-0.1431222 %79 %
134Search Result Link Text Has Year   Other-0.141110 %52 %
135Has Privacy Policy   Trust-0.141161 %70 %
136Variations making whole H1, H2, and H3 Tags   Relevancy-0.1424115 %69 %
137Has FavIcon   Technology-0.141168 %62 %
138Number of Twitter Accounts   Authority-0.1418147 %68 %
139Variations in H4 Tags   Relevancy-0.1430117 %78 %
140Percentage of DoFollow Internal Links   Authority-0.13948089 %63 %
141Ahrefs Redirects   Authority-0.13133311 %15 %
142Percentage of DoFollow Links   Authority-0.131009390 %62 %
143Leading Variations in H3 Tags   Relevancy-0.1325116 %78 %
144Number of Includes   Technology-0.13892290 %58 %
145Percentage of DoFollow External Links   Authority-0.13461482 %59 %
146Variations in ID Attributes   Relevancy-0.1325213 %73 %
147Has Meta Description   Relevancy-0.131170 %67 %
148Search Result Summary Length   Size-0.1360427094 %66 %
149Number of H4 Tags   Size-0.1332546 %72 %
150Number of Ads   Technology-0.1315113 %48 %
151Has OpenGraph Image   Relevancy-0.131145 %61 %
152Number of CSS Includes   Technology-0.1340886 %58 %
153Has Contact Page   Trust-0.131166 %60 %
154Inline CSS Kilobytes   Size-0.133423352 %75 %
155Variations in Host Citations   Relevancy-0.13245913 %60 %
156Has JSON-LD Website-0.131121 %39 %
157Percentage of NoFollow External Links   Authority-0.1318325 %71 %
158Has JSON-LD ImageObject-0.131119 %43 %
159Has Ads   Other-0.131113 %44 %
160Percentage of NoFollow Links   Authority-0.1322537 %69 %
161Variations in Label Tags   Relevancy-0.132216 %65 %
162Number of Amazon Ads   Technology-0.1315113 %48 %
163Search Result Has Schema   Other-0.13119 %56 %
164Number of YouTube Accounts   Technology-0.135115 %64 %
165Variations making whole H1 Tags   Relevancy-0.132110 %64 %
166Number of JavaScript Includes   Technology-0.13571588 %60 %
167Has JSON-LD Organization-0.131128 %42 %
168Number of Images without ALT Text   Size-0.13991273 %73 %
169Search Result Publish Date-0.132009815248198150506395 %44 %
170Number of Facebook Accounts   Authority-0.1312136 %68 %
171Has Amazon Ads   Other-0.131113 %44 %
172Title Word Count   Size-0.1322992 %59 %
173Ahrefs EDU Backlinks   Authority-0.13414197318 %12 %
174Variations in Main Tags   Relevancy-0.133313523 %71 %
175Aggressive Variation Density   Relevancy-0.138110 %65 %
176Has Terms of Service   Trust-0.131143 %65 %
177Has Meta Twitter Description   Authority-0.131133 %59 %
178Ahrefs Has EDU Backlinks   Authority-0.13118 %11 %
179Is OpenGraph Type Article   Technology-0.131133 %55 %
180Number of Forms   Technology-0.1322370 %66 %
181Has JSON-LD Article-0.131110 %38 %
182Search Result Has Rating   Other-0.13118 %53 %
183Has JSON-LD Search Action-0.131119 %40 %
184Variations in HTML Comment Tags   Relevancy-0.13660512 %70 %
185Has Meta Twitter Title   Authority-0.131134 %58 %
186Variations in Meta Keywords   Relevancy-0.1396219 %67 %
187Variations in OpenGraph Site Name   Relevancy-0.132114 %59 %
188Has MicroData Rating Value-0.13116 %52 %
189Number of HTML Comments   Size-0.132913585 %65 %
190Has JSON-LD WebPage-0.131118 %43 %
191Variations in Value Attributes   Relevancy-0.1382215 %70 %
192Has JSON-LD Schema Markup   Relevancy-0.131126 %43 %
193Exact Matches in H3 Tags   Relevancy-0.139719 %50 %
194Title Has Top   Other-0.12115 %43 %
195Has OpenGraph Type   Relevancy-0.121153 %59 %
196Has US Phone Number   Trust-0.121141 %58 %
197Ahrefs Has Redirects   Authority-0.121111 %14 %
198Has MicroData Aggregate Rating-0.12115 %49 %
199Has Copyright   Trust-0.121176 %60 %
200Title Length   Size-0.121245991 %54 %