Measures 147464 SEO Factors

145742 Built-In SEO Factors

136587 On-page SEO Factors

9155 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-0.24100233885 %83 %
2Number of Top 200 Shared Factors Used   Diversity-0.22534096 %94 %
3Number of Unique Variations Used   Diversity-0.2224679 %89 %
4Number of Top 100 Shared Factors Used   Diversity-0.22393096 %93 %
5Entities in Title Tag   Relevancy-0.227371 %94 %
6Number of Distinct Entities Used   Diversity-0.22633179 %95 %
7Number of Top 50 Shared Factors Used   Diversity-0.21161396 %94 %
8Search Result Domain is .com, .net, or .org   Other-0.21114 %57 %
9Variations in Div Tags   Relevancy-0.25222318174 %89 %
10Variations in Search Result Document File Name   Relevancy-0.29147 %76 %
11Variations in H1-H6 Tags   Relevancy-0.2189664 %89 %
12Variations in Body Tags   Relevancy-0.213377245378 %89 %
13Entities in the HTML Tag   Relevancy-0.251814575 %95 %
14Variations in HTML Tags   Relevancy-0.213377245177 %89 %
15Entities in Sentences   Relevancy-0.251514272 %95 %
16Search Result Domain is .com   Other-0.19114 %56 %
17Variations in H1, H2, and H3 Tags   Relevancy-0.19169563 %90 %
18Variations in H1 and H2 Tags   Relevancy-0.1973460 %89 %
19Variations in P Tags   Relevancy-0.1927543167 %89 %
20Entities in H1 Tags-0.197260 %92 %
21Number of Referring Domains   Authority-0.19242513346 %69 %
22Load Time Milliseconds   Performance-0.1910076121985 %88 %
23Number of Factors Used   Diversity-0.1928117996 %88 %
24Number of Backlinks   Authority-0.19770312930746 %70 %
25Term Frequency   Relevancy-0.195377 %90 %
26Variations in LI Tags   Relevancy-0.1828912365 %88 %
27Exact Matches in the HTML Tag   Relevancy-0.183491432 %85 %
28Variations in Sentences   Relevancy-0.18106104771 %88 %
29Variations in A Tags   Relevancy-0.1854832965 %85 %
30Number of Do Follow Backlinks   Authority-0.18715834846942 %69 %
31LSI Words in Sentences   Relevancy-0.18246276970 %94 %
32Variations in H1 Tags   Relevancy-0.187153 %89 %
33Variations in Search Result Display URL   Relevancy-0.1811274 %80 %
34Variations in Search Result Link Text   Relevancy-0.1811274 %80 %
35Variations in Search Result URL Path   Relevancy-0.189145 %85 %
36Number of Images   Size-0.181362978 %87 %
37Variations in the Title Tag   Relevancy-0.1811263 %87 %
38Entities in H2 Tags-0.1831753 %93 %
39Number of No Follow Backlinks   Authority-0.1754478100535 %66 %
40Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1718243 %88 %
41LSI Words in Title Tag   Relevancy-0.1714671 %94 %
42Leading Variations in H1-H6 Tags   Relevancy-0.1720245 %89 %
43Variation Count in Top 30KB   Relevancy-0.1744213066 %86 %
44Number of Images with ALT Text   Size-0.171052074 %89 %
45Number of HTML Tags   Size-0.173192119285 %87 %
46Clean Keyword Density in the HTML Tag   Relevancy-0.17150469 %79 %
47Variations in Meta Description   Relevancy-0.1743252 %85 %
48Word Count   Size-0.174259139285 %86 %
49Number of P Tags   Size-0.171223677 %89 %
50Unabridged Word Count   Size-0.174792175385 %87 %
51Variations in H2 Tags   Relevancy-0.1768343 %86 %
52Variations in ALT Attributes   Relevancy-0.17410643 %83 %
53Entities in Meta Description Tag   Relevancy-0.1711359 %89 %
54Variations in the Canonical URL   Relevancy-0.1748248 %84 %
55Number of Forms   Technology-0.1714358 %81 %
56Variations in Span Tags   Relevancy-0.1710811050 %87 %
57Variations in Nav Tags   Relevancy-0.17131854647 %84 %
58Clean Text Kilobytes   Size-0.171121278 %88 %
59Variations in A Tag HREF Attributes   Relevancy-0.1638014757 %88 %
60Exact Matches in H1-H6 Tags   Relevancy-0.169122 %84 %
61Variations in Search Result URL   Relevancy-0.1622151 %80 %
62LSI Words in H1 Tags   Relevancy-0.1614462 %92 %
63TF/IDF   Relevancy-0.161157 %86 %
64Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621183058 %89 %
65Has Entities in H1 Tags   Relevancy-0.161160 %89 %
66Number of Heading Tags   Size-0.16532178 %87 %
67Number of HTTPS Links   Authority-0.1646316982 %87 %
68Number of DoFollow Links   Authority-0.1645016682 %87 %
69Entities in H3 Tags-0.1623644 %92 %
70Number of Internal Links   Authority-0.1643515682 %87 %
71Number of Links   Authority-0.1646417082 %87 %
72Leading Variations in H1 Tags   Relevancy-0.161129 %82 %
73Percentage of DoFollow Internal Links   Authority-0.16937681 %86 %
74Leading Variations in Title Tag   Relevancy-0.161132 %80 %
75Variations in Main Tags   Relevancy-0.16254398837 %89 %
76Exact Matches in Top 30KB   Relevancy-0.1629220 %78 %
77Percentage of DoFollow Links   Authority-0.161008682 %92 %
78Variation Density in Top 30KB   Relevancy-0.16247359 %80 %
79Exact Matches in Title Tag   Relevancy-0.162120 %82 %
80Variations in First 100 Words   Relevancy-0.16152662 %83 %
81Exact Matches in Sentences   Relevancy-0.1642324 %84 %
82Uses Microdata WPAdBlock   Other-0.15111 %16 %
83Uses Schema wpadblock   Other-0.15111 %16 %
84Number of HTML Comments   Size-0.159814575 %87 %
85Search Result Number of Dirs in Path   Other-0.153275 %73 %
86Number of H1 Tags   Size-0.154273 %89 %
87Title Tag Has Entities   Relevancy-0.151171 %88 %
88Number of DoFollow External Links   Authority-0.15551378 %86 %
89Variations in Absolute URLs   Relevancy-0.1588477258 %86 %
90Number of External Links   Authority-0.15731579 %86 %
91LSI Words in Meta Description Tag   Relevancy-0.15421159 %91 %
92Variations in OpenGraph Title   Relevancy-0.159150 %79 %
93Uses JSON-LD itemReviewed-0.15112 %15 %
94Variations in Script Tags   Relevancy-0.154881517561 %85 %
95Number of H2 Tags   Size-0.1518768 %85 %
96Variations in Footer Tags   Relevancy-0.1539751335 %82 %
97Variations in OpenGraph Description   Relevancy-0.1597245 %80 %
98LSI Words in H2 Tags   Relevancy-0.14801957 %92 %
99Variations making whole H1-H6 Tags   Relevancy-0.142119 %78 %
100Flesch Kincaid Reading Grade Level   Other-0.147292 %88 %
101Has Privacy Policy   Trust-0.141159 %72 %
102Variations in H3 Tags   Relevancy-0.1496331 %82 %
103Has Form   Technology-0.141157 %78 %
104Exact Matches in H1 Tags   Relevancy-0.142115 %84 %
105Has Meta Charset   Technology-0.141177 %84 %
106Variations making whole H1, H2, and H3 Tags   Relevancy-0.141117 %78 %
107Variations in TITLE Attributes   Relevancy-0.14345738 %82 %
108Number of Sentences   Size-0.1462212284 %83 %
109Is Store Page   Other-0.141153 %70 %
110Leading Variations in H2 Tags   Relevancy-0.148121 %83 %
111Has Entities in H2 Tags   Relevancy-0.141153 %85 %
112Variations Making Whole Span Tags   Relevancy-0.144121 %82 %
113Variations in Section Tags   Relevancy-0.1415601734 %82 %
114Average Words Per Sentence   Size-0.141663281 %82 %
115Number of H3 Tags   Size-0.1423860 %82 %
116Has Canonical URL   Authority-0.141173 %78 %
117Meta Description Tag Has Entities   Relevancy-0.141159 %81 %
118Number of Questions In Headings   Size-0.147234 %79 %
119Has FavIcon   Technology-0.141177 %80 %
120Variations in Strong Tags   Relevancy-0.1495224 %82 %
121Search Result Uses HTTPS   Other-0.131185 %84 %
122Number of Images without ALT Text   Size-0.13591058 %79 %
123Has Meta Viewport   Technology-0.131183 %83 %
124Entities in H4 Tags-0.1310222 %86 %
125Title Word Count   Size-0.1313883 %78 %
126Has Meta Description   Relevancy-0.131167 %80 %
127Number of Facebook Pages   Authority-0.139262 %77 %
128Number Of JSON-LD Types   Relevancy-0.131461356 %74 %
129Number of Absolute URLs   Authority-0.13114928584 %78 %
130Variations making whole H1 Tags   Relevancy-0.131112 %79 %
131Title Length   Size-0.13935084 %80 %
132Search Result Domain Length   Size-0.13261785 %77 %
133Search Result Host Length   Size-0.13261785 %77 %
134Number of Includes   Technology-0.13482783 %72 %
135Variations Making Whole LI Tags   Relevancy-0.134125 %78 %
136Uses Schema image   Other-0.131122 %68 %
137Number of H4 Tags   Size-0.1316438 %80 %
138Is Home Page   Other-0.131119 %41 %
139Number of Prices   Size-0.133876569 %82 %
140Has Entities in H3 Tags   Relevancy-0.131145 %80 %
141Uses Schema sku   Other-0.13117 %42 %
142Percentage of DoFollow External Links   Authority-0.13271176 %79 %
143Has JSON-LD Schema Markup   Relevancy-0.131154 %68 %
144Exact Matches in H2 Tags   Relevancy-0.134112 %83 %
145Variations making whole A Tags   Relevancy-0.13111228 %73 %
146LSI Words in H3 Tags   Relevancy-0.13781949 %89 %
147Page Size Kilobytes   Size-0.1384831184 %75 %
148Word Count in Meta Description   Size-0.13482068 %78 %
149Uses Schema name   Other-0.131161 %69 %
150Has Contact Page   Trust-0.131163 %70 %
151Uses JSON-LD sku   Other-0.13116 %41 %
152Headings Has Question   Other-0.131134 %73 %
153Number of Questions In H2 Tags   Size-0.134121 %78 %
154Meta Description Length   Size-0.1330912368 %79 %
155Number of Questions   Size-0.12821069 %78 %
156Uses Schema itemreviewed   Other-0.12113 %23 %
157Number of JavaScript Includes   Technology-0.12381782 %73 %
158Exact Matches in Meta Description   Relevancy-0.122113 %84 %
159Has Schema Markup   Relevancy-0.121165 %72 %
160Number of Social Pages   Authority-0.1216466 %78 %
161Is Purchase Page   Other-0.121145 %69 %
162Number of Social Accounts   Authority-0.128242 %78 %
163Number of CSS Includes   Technology-0.12201076 %73 %
164Number of Email Addresses   Trust-0.1272545 %81 %
165Uses Schema aggregaterating   Other-0.121110 %65 %
166Number of LinkedIn Pages   Authority-0.124128 %70 %
167Has Meta Robots   Other-0.121129 %69 %
168Number of Instagram Pages   Authority-0.1216249 %76 %
169Search Result URL Length   Size-0.12896197 %55 %
170Uses Schema gtin13   Other-0.12113 %16 %
171Number of Facebook Accounts   Authority-0.127129 %75 %
172Uses JSON-LD name   Other-0.121153 %69 %
173Inline CSS Kilobytes   Size-0.121945764 %66 %
174Uses Schema cssselector   Other-0.12111 %11 %
175Uses JSON-LD image   Other-0.121116 %71 %
176Uses Schema ratingvalue   Other-0.12119 %62 %
177Uses Schema availability   Other-0.12119 %49 %
178Uses JSON-LD BreadcrumbList   Other-0.121135 %63 %
179Uses JSON-LD ListItem   Other-0.121135 %66 %
180Number of Nofollow Links   Authority-0.1223527 %76 %
181LSI Words in H4 Tags   Relevancy-0.1265730 %85 %
182Uses JSON-LD itemCondition   Other-0.12114 %32 %
183Variations in H4-H6 Tags   Relevancy-0.1221115 %76 %
184Uses Microdata sku   Other-0.12114 %16 %
185Variations in Button Tags   Relevancy-0.12427098 %82 %
186Variations in I Tags   Relevancy-0.1293425 %78 %
187Has OpenGraph Type   Relevancy-0.121161 %70 %
188Inline JavaScript Kilobytes   Size-0.1244710382 %74 %
189Number of US Phone Numbers   Trust-0.116701235 %76 %
190Uses Schema organization   Other-0.111136 %66 %
191Is Pagination Page   Other-0.111119 %61 %
192Search Result Summary Length   Size-0.1116215296 %63 %
193Uses Microdata name   Other-0.111116 %55 %
194Uses Schema pricecurrency   Other-0.111111 %51 %
195Has Terms of Service   Trust-0.111131 %59 %
196Uses Schema listitem   Other-0.111143 %64 %
197Uses Schema product   Other-0.111111 %55 %
198Variations Making Whole Strong Tags   Relevancy-0.11516 %77 %
199Is OpenGraph Type Article   Technology-0.111132 %47 %
200Variations in Figure Tags   Relevancy-0.11524510 %77 %