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 2019-7     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-0.319111394 %89 %
2Variations in HTML Tags   Relevancy-0.28176220686 %92 %
3Term Frequency   Relevancy-0.279686 %90 %
4Ahrefs Rank   Authority-0.27341694 %15 %
5Variations in Body Tags   Relevancy-0.27167516982 %93 %
6Variations in Sentences   Relevancy-0.264335484 %91 %
7Variations in Div Tags   Relevancy-0.26141211483 %91 %
8Ahrefs Referring Class C Addresses   Authority-0.258813253 %20 %
9Ahrefs Referring IP Addresses   Authority-0.2512253753 %20 %
10Ahrefs Referring Domains   Authority-0.2421045253 %21 %
11Variations in A Tag HREF Attributes   Relevancy-0.248945076 %89 %
12Variations in H1-H6 Tags   Relevancy-0.2454777 %90 %
13Variations in A Tags   Relevancy-0.231922778 %91 %
14Ahrefs Text Backlinks   Authority-0.23451657638352 %20 %
15Ahrefs Backlinks   Authority-0.23451666640553 %20 %
16Ahrefs Referring Pages   Authority-0.23451667641053 %21 %
17Ahrefs NoFollow Backlinks   Authority-0.235767252941 %21 %
18Variations in P Tags   Relevancy-0.232543076 %90 %
19Variations in H1, H2, and H3 Tags   Relevancy-0.2346676 %90 %
20Variations in First 100 Words   Relevancy-0.2241871 %80 %
21Variations in LI Tags   Relevancy-0.221432076 %90 %
22Variations in Absolute URLs   Relevancy-0.229255874 %87 %
23Search Result Number of Site Links   Other-0.22212 %48 %
24Ahrefs Dofollow Backlinks   Authority-0.22450093587446 %20 %
25Variations in Search Result Display URL   Relevancy-0.225286 %78 %
26Variations in Search Result Link Text   Relevancy-0.225286 %78 %
27Keywords in pages top 10 most used phrases-0.226268 %83 %
28Ahrefs Has NoFollow Backlinks   Authority-0.211140 %20 %
29Variations in H1 and H2 Tags   Relevancy-0.2131473 %87 %
30Clean Text Kilobytes   Size-0.21911085 %78 %
31Ahrefs Has Text Backlinks   Authority-0.211152 %20 %
32Variations in the Title Tag   Relevancy-0.215279 %77 %
33TF/IDF   Relevancy-0.211170 %76 %
34Exact Matches in the HTML Tag   Relevancy-0.26861240 %81 %
35Ahrefs Has Backlinks   Authority-0.21153 %20 %
36Word Count   Size-0.24534126291 %80 %
37Unabridged Word Count   Size-0.219027160691 %79 %
38Exact Matches in Sentences   Relevancy-0.277436 %79 %
39Ahrefs Has Dofollow Backlinks   Authority-0.21145 %19 %
40Number of Sentences   Size-0.23056290 %81 %
41Exact Matches in Body Tag   Relevancy-0.28841539 %83 %
42Keywords in pages top 5 most used phrases-0.24259 %83 %
43Variations in Search Result URL   Relevancy-0.25265 %71 %
44Variations in Script Tags   Relevancy-0.214193859 %86 %
45Leading Variations in H1-H6 Tags   Relevancy-0.1940250 %86 %
46Variations in Meta Description   Relevancy-0.1914259 %83 %
47Variations in Search Result URL Path   Relevancy-0.195261 %70 %
48Keywords in pages top 3 most used phrases-0.193150 %80 %
49Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1925247 %86 %
50Exact Matches in H1-H6 Tags   Relevancy-0.1913229 %73 %
51Variations in H2 Tags   Relevancy-0.1931345 %88 %
52Variations in ALT Attributes   Relevancy-0.19164749 %87 %
53Variations in the last 100 words   Relevancy-0.1922561 %75 %
54Number of HTML Tags   Size-0.19336189994 %79 %
55Number of P Tags   Size-0.181853586 %81 %
56Variations in Span Tags   Relevancy-0.18981058 %86 %
57Variations in H1 Tags   Relevancy-0.186264 %78 %
58Variations in the Canonical URL   Relevancy-0.185249 %73 %
59Ahrefs Word Count   Size-0.183878130168 %13 %
60Number of Heading Tags   Size-0.18782089 %81 %
61Variations in Search Result Document File Name   Relevancy-0.185257 %67 %
62Number of HTTPS Links   Authority-0.1761712887 %80 %
63Number of Images   Size-0.171262789 %80 %
64Variations in H3 Tags   Relevancy-0.1725334 %86 %
65Number of Images with ALT Text   Size-0.17971681 %81 %
66Body Tag Size Kilobytes   Size-0.1761010290 %78 %
67Page Size Kilobytes   Size-0.1789614594 %76 %
68Number of Links   Authority-0.1764414391 %78 %
69Exact Matches in Title Tag   Relevancy-0.172128 %65 %
70Number of Internal Links   Authority-0.1761112690 %78 %
71Ahrefs Internal Links   Authority-0.173727666 %21 %
72Ahrefs Image Backlinks-0.174765387920 %17 %
73Variations in Nav Tags   Relevancy-0.171481542 %82 %
74Average Words Per Sentence   Size-0.173513786 %65 %
75Number of Absolute URLs   Authority-0.1786117393 %77 %
76Number of DoFollow Links   Authority-0.1763613791 %78 %
77Exact Matches in A Tags   Relevancy-0.1758325 %70 %
78Leading Variations in Title Tag   Relevancy-0.171136 %75 %
79Ahrefs External Links   Authority-0.16941561 %20 %
80Variations in Summary Tags   Relevancy-0.162861546 %81 %
81Ahrefs Linked Root Domains   Authority-0.1626766 %20 %
82Exact Matches in H1 Tags   Relevancy-0.162122 %62 %
83Variations in OpenGraph Title   Relevancy-0.164149 %74 %
84Variations in OpenGraph Description   Relevancy-0.1611243 %77 %
85Ahrefs Has Image Backlinks   Authority-0.161120 %17 %
86Ahrefs Pages   Size-0.165267 %20 %
87Load Time Milliseconds   Performance-0.1683757417494 %68 %
88Leading Variations in H1 Tags   Relevancy-0.162131 %77 %
89Number of H3 Tags   Size-0.1634865 %79 %
90Number of H2 Tags   Size-0.1627671 %78 %
91Ahrefs Page Size   Size-0.16583272328369 %13 %
92Variations Making Whole Span Tags   Relevancy-0.1619121 %77 %
93Exact Matches in H2 Tags   Relevancy-0.168114 %63 %
94Flesch Kincaid Reading Grade Level   Other-0.16881689 %63 %
95Variations making whole A Tags   Relevancy-0.1666235 %81 %
96Variations in TITLE Attributes   Relevancy-0.16427846 %83 %
97Ahrefs Has Linked Root Domains   Authority-0.161165 %18 %
98Number of External Links   Authority-0.161461885 %73 %
99Ahrefs Has Internal Links   Authority-0.161164 %18 %
100Leading Variations in H2 Tags   Relevancy-0.1511121 %82 %
101Inline JavaScript Kilobytes   Size-0.154874087 %76 %
102Variations in Strong Tags   Relevancy-0.1552331 %81 %
103Variations in Footer Tags   Relevancy-0.15207635 %79 %
104Flesch Kincaid Reading Ease   -0.151376990 %68 %
105Has Email   Trust-0.151136 %54 %
106Ahrefs Images   Relevancy-0.15571865 %13 %
107Variations Making Whole LI Tags   Relevancy-0.1511126 %78 %
108Keywords in pages most used phrase-0.151128 %71 %
109Exact Matches in Meta Description   Relevancy-0.152117 %62 %
110Number of Email Addresses   Trust-0.1591337 %68 %
111Ahrefs Has External Links   Authority-0.151159 %18 %
112Title Has Sentiment Words   Other-0.151117 %63 %
113Title Has Sales Words   Other-0.151117 %63 %
114Title Has Best   Other-0.151113 %51 %
115Head Size Kilobytes   Size-0.154643991 %75 %
116Variations in Section Tags   Relevancy-0.151161434 %81 %
117Number of Social Pages   Authority-0.1545246 %68 %
118Variations in Article Tags   Relevancy-0.152401930 %73 %
119Variations in Class Attributes   Relevancy-0.15274726 %76 %
120Number of Social Accounts   Authority-0.1519254 %70 %
121Has Canonical URL   Authority-0.141167 %68 %
122Number of US Phone Numbers   Trust-0.14215741 %73 %
123Word Count in Meta Description   Size-0.14952168 %76 %
124Variations making whole H1-H6 Tags   Relevancy-0.1413116 %73 %
125Number of DoFollow External Links   Authority-0.141641583 %71 %
126Leading Variations in H3 Tags   Relevancy-0.1414116 %78 %
127Variations in Search Result Summary   Relevancy-0.149389 %68 %
128Meta Description Length   Size-0.1465812568 %76 %
129Variations in Host Citations   Relevancy-0.144681015 %62 %
130Variations making whole H1, H2, and H3 Tags   Relevancy-0.144114 %71 %
131Ahrefs Has Images   Other-0.141165 %11 %
132Has Meta Description   Relevancy-0.141169 %68 %
133Percentage of DoFollow Internal Links   Authority-0.14968189 %67 %
134Variations in I Tags   Relevancy-0.1441322 %80 %
135Title Has Year   Other-0.141110 %54 %
136Variations in Meta Twitter Description   Relevancy-0.1420127 %73 %
137Number of Nofollow Links   Authority-0.14168736 %78 %
138Variations in H4-H6 Tags   Relevancy-0.1416222 %79 %
139Variations in Meta Twitter Content   Relevancy-0.143130 %70 %
140Has Meta Viewport   Technology-0.141188 %52 %
141Search Result Link Text Has Year   Other-0.141110 %53 %
142Exact Matches making whole H1-H6 Tags   Relevancy-0.14518 %50 %
143Number of Twitter Accounts   Authority-0.1411145 %67 %
144Number of Includes   Technology-0.14992290 %61 %
145Number of NoFollow External Links   Authority-0.1455425 %77 %
146Title Word Count   Size-0.1418992 %58 %
147Has Contact Page   Trust-0.141167 %60 %
148Has Privacy Policy   Trust-0.141159 %70 %
149Number of CSS Includes   Technology-0.1353886 %59 %
150Search Result Publish Date-0.132008288673193848888893 %41 %
151Search Result Uses HTTPS   Other-0.131183 %72 %
152Variations in H4 Tags   Relevancy-0.1315118 %78 %
153Percentage of NoFollow Links   Authority-0.1322535 %72 %
154Number of JavaScript Includes   Technology-0.13711588 %62 %
155Exact Matches making whole H1, H2, and H3 Tags   Relevancy-0.13418 %50 %
156Has FavIcon   Technology-0.131172 %66 %
157Variations in ID Attributes   Relevancy-0.1320112 %71 %
158Ahrefs EDU Backlinks   Authority-0.134939478 %13 %
159Variations in OpenGraph Site Name   Relevancy-0.132114 %60 %
160Variations in Search Result URL Host Name   Relevancy-0.13217 %45 %
161Number of HTML Comments   Size-0.131773485 %69 %
162Has DocType Tag   Technology-0.131183 %59 %
163Variations making whole H1 Tags   Relevancy-0.131110 %68 %
164Variations in Search Result URL Domain Name   Relevancy-0.13217 %45 %
165Title Length   Size-0.131065791 %56 %
166Search Result Summary Length   Size-0.1357027295 %62 %
167Variations in Main Tags   Relevancy-0.134653323 %77 %
168Has JSON-LD Schema Markup   Relevancy-0.131125 %59 %
169Has JSON-LD ImageObject-0.131120 %51 %
170Exact Matches making whole H1 Tags   Relevancy-0.13117 %46 %
171Number of Facebook Accounts   Authority-0.138134 %68 %
172Has JSON-LD Website-0.131122 %49 %
173Has Terms of Service   Trust-0.131142 %67 %
174Ahrefs Has EDU Backlinks   Authority-0.13118 %12 %
175Number of Forms   Technology-0.1330368 %68 %
176Percentage of NoFollow External Links   Authority-0.1318323 %72 %
177Exact Matches making whole A Tags   Relevancy-0.13419 %46 %
178Has Copyright   Trust-0.131175 %61 %
179Ahrefs Redirects   Authority-0.13274310 %16 %
180Search Result Has Schema   Other-0.13118 %51 %
181Has Apple Touch Icon   Technology-0.131138 %61 %
182Number of Images without ALT Text   Size-0.13601172 %74 %
183Exact Matches in H3 Tags   Relevancy-0.13418 %50 %
184Variations in Label Tags   Relevancy-0.133416 %63 %
185Number of H4 Tags   Size-0.1338445 %74 %
186Variations in Value Attributes   Relevancy-0.13252215 %71 %
187Number of YouTube Accounts   Technology-0.132114 %63 %
188Number of HREF Lang Tags   Size-0.133429 %68 %
189Has US Phone Number   Trust-0.131141 %58 %
190Search Result Has Rating   Other-0.13118 %47 %
191Percentage of DoFollow Links   Authority-0.131009490 %64 %
192Inline CSS Kilobytes   Size-0.134612850 %73 %
193Has Meta Twitter Card   Authority-0.131137 %55 %
194Number of Ads   Technology-0.1313111 %43 %
195Variations Making Whole Strong Tags   Relevancy-0.131217 %67 %
196Has OpenGraph Type   Relevancy-0.131151 %58 %
197Has Meta Twitter Description   Authority-0.131132 %60 %
198Has JSON-LD Organization-0.131126 %53 %
199Number of Amazon Ads   Technology-0.1313111 %42 %
200Has OpenGraph Image   Relevancy-0.131144 %62 %