Measures 147562 SEO Factors

145840 Built-In SEO Factors

136681 On-page SEO Factors

9159 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 Unique LSI Words Used   Diversity-0.23100232184 %83 %
2Number of Unique Variations Used   Diversity-0.2224679 %87 %
3Number of Distinct Entities Used   Diversity-0.22633080 %95 %
4Number of Top 200 Shared Factors Used   Diversity-0.22534097 %93 %
5Entities in Title Tag   Relevancy-0.227371 %94 %
6Number of Top 100 Shared Factors Used   Diversity-0.22393097 %92 %
7Number of Top 50 Shared Factors Used   Diversity-0.21161396 %92 %
8Search Result Domain is .com, .net, or .org   Other-0.21114 %61 %
9Variations in Div Tags   Relevancy-0.25222314974 %89 %
10Variations in Body Tags   Relevancy-0.213377235778 %88 %
11Entities in the HTML Tag   Relevancy-0.272314075 %94 %
12Entities in Sentences   Relevancy-0.263013673 %94 %
13Variations in HTML Tags   Relevancy-0.213377235378 %89 %
14Variations in H1-H6 Tags   Relevancy-0.19189664 %88 %
15Search Result Domain is .com   Other-0.19114 %61 %
16Variations in H1, H2, and H3 Tags   Relevancy-0.19169663 %88 %
17Variations in H1 and H2 Tags   Relevancy-0.1978460 %87 %
18Variations in P Tags   Relevancy-0.1927543167 %90 %
19Load Time Milliseconds   Performance-0.1923823136685 %88 %
20Variations in Search Result Document File Name   Relevancy-0.199145 %79 %
21Entities in H1 Tags-0.197258 %92 %
22Variations in Sentences   Relevancy-0.19106104271 %88 %
23Number of Factors Used   Diversity-0.1828117997 %88 %
24Term Frequency   Relevancy-0.185378 %90 %
25Variations in LI Tags   Relevancy-0.1828912265 %87 %
26Number of Referring Domains   Authority-0.18242511546 %69 %
27Variations in A Tags   Relevancy-0.1854832564 %84 %
28LSI Words in Sentences   Relevancy-0.18271373970 %94 %
29Entities in H2 Tags-0.1831653 %93 %
30Variations in Search Result Display URL   Relevancy-0.1815275 %81 %
31Variations in Search Result Link Text   Relevancy-0.1815275 %81 %
32Number of Backlinks   Authority-0.18770312731646 %71 %
33Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1818243 %86 %
34Variations in H1 Tags   Relevancy-0.1812153 %87 %
35Exact Matches in the HTML Tag   Relevancy-0.183491430 %85 %
36Variations in the Title Tag   Relevancy-0.1716263 %87 %
37Leading Variations in H1-H6 Tags   Relevancy-0.1720245 %87 %
38LSI Words in Title Tag   Relevancy-0.1714671 %94 %
39Number of Images   Size-0.171662978 %86 %
40Variations in Search Result URL Path   Relevancy-0.179145 %84 %
41Number of Do Follow Backlinks   Authority-0.17715834665042 %70 %
42Number of HTML Tags   Size-0.173192114785 %86 %
43Variations in Meta Description   Relevancy-0.1743252 %84 %
44Entities in Meta Description Tag   Relevancy-0.1711359 %89 %
45Word Count   Size-0.174259137285 %86 %
46Variation Count in Top 30KB   Relevancy-0.1759573066 %86 %
47Number of No Follow Backlinks   Authority-0.175447878935 %66 %
48Number of Images with ALT Text   Size-0.171142073 %88 %
49Clean Keyword Density in the HTML Tag   Relevancy-0.17150469 %79 %
50Variations in H2 Tags   Relevancy-0.1768343 %84 %
51Unabridged Word Count   Size-0.176247173485 %87 %
52Variations in A Tag HREF Attributes   Relevancy-0.1638014458 %87 %
53Variations in the Canonical URL   Relevancy-0.1648249 %85 %
54Clean Text Kilobytes   Size-0.161121277 %87 %
55Number of P Tags   Size-0.161223677 %88 %
56Variations in Span Tags   Relevancy-0.161081950 %87 %
57Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182758 %88 %
58Variations in ALT Attributes   Relevancy-0.16410643 %84 %
59Has Entities in H1 Tags   Relevancy-0.161159 %88 %
60Entities in H3 Tags-0.1627644 %93 %
61Leading Variations in H1 Tags   Relevancy-0.162129 %81 %
62Variations in Nav Tags   Relevancy-0.16131854047 %84 %
63Variations in Search Result URL   Relevancy-0.1622152 %80 %
64TF/IDF   Relevancy-0.161156 %86 %
65LSI Words in H1 Tags   Relevancy-0.1614461 %92 %
66Number of Heading Tags   Size-0.16532178 %86 %
67Number of HTTPS Links   Authority-0.1659916082 %86 %
68Number of DoFollow Links   Authority-0.1659515882 %86 %
69Number of Links   Authority-0.1659916282 %85 %
70Number of Forms   Technology-0.1614357 %81 %
71Number of Internal Links   Authority-0.1659214881 %85 %
72Variation Density in Top 30KB   Relevancy-0.16296359 %80 %
73Variations in First 100 Words   Relevancy-0.16152663 %83 %
74Uses Microdata WPAdBlock   Other-0.16111 %13 %
75Uses Schema wpadblock   Other-0.16111 %13 %
76Exact Matches in H1-H6 Tags   Relevancy-0.1611120 %84 %
77Leading Variations in Title Tag   Relevancy-0.161132 %80 %
78Variations in Main Tags   Relevancy-0.15254398337 %87 %
79Percentage of DoFollow Internal Links   Authority-0.15937681 %86 %
80Percentage of DoFollow Links   Authority-0.151008582 %91 %
81Variations in Script Tags   Relevancy-0.154881514261 %85 %
82Variations in Absolute URLs   Relevancy-0.1588476759 %87 %
83Title Tag Has Entities   Relevancy-0.151171 %88 %
84Number of H1 Tags   Size-0.155272 %87 %
85Number of HTML Comments   Size-0.159814674 %85 %
86LSI Words in Meta Description Tag   Relevancy-0.15421158 %91 %
87Variations in OpenGraph Title   Relevancy-0.1511151 %78 %
88Search Result Number of Dirs in Path   Other-0.154274 %74 %
89Exact Matches in Top 30KB   Relevancy-0.1529218 %77 %
90Number of DoFollow External Links   Authority-0.15551377 %84 %
91Number of External Links   Authority-0.15731478 %84 %
92Variations in OpenGraph Description   Relevancy-0.1597246 %79 %
93Uses JSON-LD itemReviewed-0.15112 %12 %
94Number of H2 Tags   Size-0.1518768 %85 %
95Exact Matches in Sentences   Relevancy-0.1542322 %84 %
96LSI Words in H2 Tags   Relevancy-0.15811958 %92 %
97Exact Matches in Title Tag   Relevancy-0.142118 %83 %
98Variations in H3 Tags   Relevancy-0.1496332 %83 %
99Variations making whole H1-H6 Tags   Relevancy-0.142118 %78 %
100Variations in Footer Tags   Relevancy-0.1439751335 %82 %
101Number of Sentences   Size-0.1462212284 %83 %
102Flesch Kincaid Reading Grade Level   Other-0.147292 %87 %
103Has Privacy Policy   Trust-0.141158 %72 %
104Variations in TITLE Attributes   Relevancy-0.14345637 %82 %
105Has Entities in H2 Tags   Relevancy-0.141154 %85 %
106Variations making whole H1, H2, and H3 Tags   Relevancy-0.141116 %78 %
107Leading Variations in H2 Tags   Relevancy-0.148121 %82 %
108Number of Images without ALT Text   Size-0.141061059 %79 %
109Average Words Per Sentence   Size-0.141663280 %81 %
110Has Form   Technology-0.141155 %78 %
111Number of H3 Tags   Size-0.1438860 %83 %
112Has Meta Charset   Technology-0.141177 %84 %
113Variations in Section Tags   Relevancy-0.1415601735 %83 %
114Number of Includes   Technology-0.13492782 %73 %
115Is Store Page   Other-0.131152 %70 %
116Meta Description Tag Has Entities   Relevancy-0.131158 %80 %
117Number of Facebook Pages   Authority-0.139261 %78 %
118Page Size Kilobytes   Size-0.1384830984 %76 %
119Entities in H4 Tags-0.1310222 %85 %
120Number of Absolute URLs   Authority-0.13114928684 %79 %
121Search Result Uses HTTPS   Other-0.131185 %83 %
122Number Of JSON-LD Types   Relevancy-0.131461356 %77 %
123Number of Questions In Headings   Size-0.138235 %79 %
124Exact Matches in H1 Tags   Relevancy-0.132114 %83 %
125Variations Making Whole Span Tags   Relevancy-0.134120 %81 %
126Has Canonical URL   Authority-0.131172 %78 %
127Variations making whole H1 Tags   Relevancy-0.131111 %77 %
128Has JSON-LD Schema Markup   Relevancy-0.131154 %70 %
129Has Meta Viewport   Technology-0.131183 %82 %
130Variations in Strong Tags   Relevancy-0.1395225 %81 %
131Search Result Domain Length   Size-0.13261785 %78 %
132Search Result Host Length   Size-0.13261785 %78 %
133Number of Prices   Size-0.133876569 %81 %
134Title Length   Size-0.13935084 %79 %
135Title Word Count   Size-0.1314884 %78 %
136Has Meta Description   Relevancy-0.131167 %79 %
137LSI Words in H3 Tags   Relevancy-0.13941950 %90 %
138Has FavIcon   Technology-0.131177 %80 %
139Variations Making Whole LI Tags   Relevancy-0.136124 %76 %
140Has Entities in H3 Tags   Relevancy-0.131145 %81 %
141Number of Questions   Size-0.131001169 %80 %
142Number of CSS Includes   Technology-0.13201075 %74 %
143Is Purchase Page   Other-0.131144 %67 %
144Variations making whole A Tags   Relevancy-0.13111228 %73 %
145Number of H4 Tags   Size-0.1316438 %80 %
146Uses Schema sku   Other-0.13117 %37 %
147Percentage of DoFollow External Links   Authority-0.13321175 %77 %
148Uses Schema image   Other-0.131122 %66 %
149Uses Schema name   Other-0.131161 %68 %
150Meta Description Length   Size-0.1330912267 %78 %
151Has Schema Markup   Relevancy-0.121165 %72 %
152Number of Questions In H2 Tags   Size-0.124121 %77 %
153Is Home Page   Other-0.121120 %40 %
154Word Count in Meta Description   Size-0.12482067 %78 %
155Number of JavaScript Includes   Technology-0.12381882 %74 %
156Has Contact Page   Trust-0.121163 %71 %
157Uses JSON-LD name   Other-0.121153 %70 %
158Inline CSS Kilobytes   Size-0.122275965 %70 %
159Uses Schema itemreviewed   Other-0.12113 %20 %
160Inline JavaScript Kilobytes   Size-0.1244710682 %75 %
161Headings Has Question   Other-0.121134 %74 %
162Uses Schema aggregaterating   Other-0.121110 %62 %
163Number of Instagram Pages   Authority-0.1216249 %77 %
164Uses JSON-LD sku   Other-0.12116 %38 %
165Number of Social Pages   Authority-0.1217466 %78 %
166Variations in Button Tags   Relevancy-0.12427078 %80 %
167Number of Email Addresses   Trust-0.1272545 %80 %
168Number of Social Accounts   Authority-0.1215242 %78 %
169Exact Matches in H2 Tags   Relevancy-0.125111 %83 %
170Variations in I Tags   Relevancy-0.12299425 %78 %
171Number of Facebook Accounts   Authority-0.128129 %75 %
172Uses JSON-LD image   Other-0.121117 %71 %
173Uses Schema pricecurrency   Other-0.12119 %50 %
174Exact Matches in Meta Description   Relevancy-0.122112 %82 %
175Variations in the last 100 words   Relevancy-0.12195344 %79 %
176Number of Nofollow Links   Authority-0.1223426 %77 %
177Has Meta Robots   Other-0.121127 %70 %
178Uses Schema availability   Other-0.12117 %48 %
179Has HREF Lang   Technology-0.121114 %68 %
180Number of LinkedIn Pages   Authority-0.1214128 %72 %
181Uses JSON-LD BreadcrumbList   Other-0.121135 %64 %
182Has OpenGraph Type   Relevancy-0.121161 %70 %
183Number of HREF Lang Tags   Size-0.1244212 %74 %
184LSI Words in H4 Tags   Relevancy-0.1165730 %84 %
185Uses JSON-LD ListItem   Other-0.111135 %66 %
186Uses Schema ratingvalue   Other-0.11119 %60 %
187Has Terms of Service   Trust-0.111133 %60 %
188Search Result URL Length   Size-0.111046297 %56 %
189Uses Schema gtin13   Other-0.11113 %13 %
190Number of US Phone Numbers   Trust-0.116701237 %76 %
191Variations in Article Tags   Relevancy-0.116171122 %71 %
192Variations in Meta Twitter Description   Relevancy-0.1130121 %70 %
193Uses Schema offer   Other-0.11119 %58 %
194Variations in Meta Twitter Content   Relevancy-0.114123 %66 %
195Is Pagination Page   Other-0.111118 %62 %
196Uses Schema product   Other-0.111110 %54 %
197Uses Microdata sku   Other-0.11113 %13 %
198Variations in H4-H6 Tags   Relevancy-0.1132116 %76 %
199Search Result Summary Length   Size-0.1121715297 %64 %
200Uses JSON-LD description   Other-0.111143 %64 %