Measures 154103 SEO Factors

152381 Built-In SEO Factors

143156 On-page SEO Factors

9225 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 2026-08     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-0.3106322469 %81 %
2Number of Referring Domains   Authority-0.37903433 %91 %
3Number of Backlinks   Authority-0.29147697159333 %92 %
4Number of Do Follow Backlinks   Authority-0.28123617128430 %92 %
5Number of Heading Tags   Size-0.27482058 %91 %
6Number of P Tags   Size-0.271813957 %91 %
7Number of No Follow Backlinks   Authority-0.263538135922 %89 %
8Number of Images   Size-0.261062658 %93 %
9Number of Top 200 Shared Factors Used   Diversity-0.26503484 %92 %
10Has Meta Charset   Technology-0.261158 %93 %
11Clean Text Kilobytes   Size-0.26701257 %93 %
12Number of Images with ALT Text   Size-0.26701853 %91 %
13Search Result Domain is .com, .net, or .org   Other-0.26115 %80 %
14Number of H1 Tags   Size-0.263154 %93 %
15Load Time Milliseconds   Performance-0.2529355212372 %90 %
16Number of Top 100 Shared Factors Used   Diversity-0.25382684 %92 %
17Unabridged Word Count   Size-0.258335172272 %93 %
18Search Result Domain is .com   Other-0.25115 %81 %
19Word Count   Size-0.257427139972 %93 %
20Number of H2 Tags   Size-0.2515752 %92 %
21Number of Top 50 Shared Factors Used   Diversity-0.25161083 %90 %
22Number of HTTPS Links   Authority-0.2350511366 %91 %
23Number of DoFollow Links   Authority-0.2350211266 %92 %
24Number of Links   Authority-0.2350511466 %91 %
25Average Words Per Sentence   Size-0.232323062 %90 %
26Number of HTML Tags   Size-0.23280194472 %91 %
27Number of External Links   Authority-0.23701262 %93 %
28Variations in H1-H6 Tags   Relevancy-0.23304844 %86 %
29Number of DoFollow External Links   Authority-0.23481161 %93 %
30Number of Internal Links   Authority-0.2349410365 %90 %
31Variations in H1, H2, and H3 Tags   Relevancy-0.23254744 %87 %
32Variations in P Tags   Relevancy-0.2350584445 %90 %
33LSI Words in Sentences   Relevancy-0.23482956650 %95 %
34Number of Facebook Pages   Authority-0.2218242 %89 %
35Variations in H1 and H2 Tags   Relevancy-0.2291443 %86 %
36Number of HTML Comments   Size-0.228877055 %91 %
37Number of H3 Tags   Size-0.2227845 %88 %
38Has JSON-LD Schema Markup   Relevancy-0.221141 %85 %
39Number of Images without ALT Text   Size-0.2244842 %93 %
40Number of Unique Variations Used   Diversity-0.22441163 %69 %
41Search Result Number of Dirs in Path   Other-0.223265 %82 %
42Number of Forms   Technology-0.217236 %89 %
43Variations in LI Tags   Relevancy-0.218572344 %86 %
44Number of Includes   Technology-0.21632465 %83 %
45LSI Words in H2 Tags   Relevancy-0.21841639 %94 %
46Has Form   Technology-0.211135 %86 %
47Number of Factors Used   Diversity-0.2131916984 %87 %
48Variations in Div Tags   Relevancy-0.212657321254 %89 %
49Leading Variations in H1-H6 Tags   Relevancy-0.28232 %84 %
50Variations in H1 Tags   Relevancy-0.25137 %87 %
51Variation Count in Top 30KB   Relevancy-0.249733346 %84 %
52Variations in Search Result Document File Name   Relevancy-0.28134 %87 %
53Entities in Sentences   Relevancy-0.258910747 %96 %
54Leading Variations in H1, H2, and H3 Tags   Relevancy-0.26231 %85 %
55Entities in H2 Tags-0.232636 %93 %
56Number Of JSON-LD Types   Relevancy-0.21481544 %87 %
57Number of LinkedIn Pages   Authority-0.23120 %90 %
58LSI Words in H1 Tags   Relevancy-0.213340 %92 %
59Variations in A Tags   Relevancy-0.232243344 %83 %
60Has US Phone Number   Trust-0.21129 %82 %
61Number of Instagram Pages   Authority-0.215234 %89 %
62Variations in H2 Tags   Relevancy-0.1982434 %84 %
63Is Home Page   Other-0.191112 %58 %
64Entities in the HTML Tag   Relevancy-0.1959211052 %95 %
65Number of Social Accounts   Authority-0.199229 %89 %
66Number of Social Pages   Authority-0.1931549 %89 %
67Flesch Kincaid Reading Grade Level   Other-0.196181 %87 %
68Number of US Phone Numbers   Trust-0.1911551329 %85 %
69Search Result Domain Length   Size-0.19241671 %79 %
70Number of CSS Includes   Technology-0.1925959 %79 %
71Search Result Host Length   Size-0.19241671 %79 %
72Uses JSON-LD name   Other-0.191142 %83 %
73Variations in Main Tags   Relevancy-0.19116449127 %85 %
74Entities in H1 Tags-0.196236 %90 %
75Number of Facebook Accounts   Authority-0.198119 %86 %
76Variations in Body Tags   Relevancy-0.1910711651759 %84 %
77Variations in Search Result URL Path   Relevancy-0.198134 %88 %
78Has Entities in H2 Tags   Relevancy-0.191136 %89 %
79Uses JSON-LD url-0.191138 %81 %
80Number of Questions In Headings   Size-0.189229 %87 %
81Has Entities in H1 Tags   Relevancy-0.181137 %91 %
82Variations in HTML Tags   Relevancy-0.1810711650258 %87 %
83LSI Words in H3 Tags   Relevancy-0.181111733 %92 %
84Variations in Search Result URL   Relevancy-0.1815140 %84 %
85Percentage of DoFollow External Links   Authority-0.18281160 %85 %
86Headings Has Question   Other-0.181129 %83 %
87Variations in Span Tags   Relevancy-0.185171135 %91 %
88Variations in ALT Attributes   Relevancy-0.17387730 %84 %
89Variations in Search Result Link Text   Relevancy-0.179260 %78 %
90Number of Distinct Entities Used   Diversity-0.17822256 %91 %
91Variations in Search Result Display URL   Relevancy-0.179260 %78 %
92Entities in H3 Tags-0.1731629 %93 %
93Variations in Nav Tags   Relevancy-0.1758574332 %80 %
94Has Apple Touch Icon   Technology-0.171138 %81 %
95Term Frequency   Relevancy-0.176357 %81 %
96Variations in Sentences   Relevancy-0.1724564652 %85 %
97Leading Variations in H1 Tags   Relevancy-0.171120 %82 %
98Search Result Summary Length   Size-0.1715514683 %76 %
99Number of H4 Tags   Size-0.1721325 %86 %
100Has Meta Robots   Other-0.171120 %83 %
101Search Result URL Length   Size-0.17876184 %59 %
102Percentage of DoFollow Links   Authority-0.17997966 %76 %
103Uses JSON-LD description   Other-0.171132 %79 %
104Variations in H3 Tags   Relevancy-0.17163326 %83 %
105Number of Twitter Accounts   Authority-0.172113 %85 %
106Number of Sentences   Size-0.1786014869 %81 %
107Variations in Section Tags   Relevancy-0.1713352227 %89 %
108Is Article Page   Other-0.171132 %77 %
109Has Privacy Policy   Trust-0.171147 %68 %
110Number of JavaScript Includes   Technology-0.16611767 %81 %
111Uses Schema organization   Other-0.161126 %81 %
112Variations in the Title Tag   Relevancy-0.1613246 %75 %
113Search Result Uses HTTPS   Other-0.161172 %82 %
114Uses Schema website   Other-0.161126 %72 %
115Has Contact Page   Trust-0.161150 %61 %
116Uses JSON-LD BreadcrumbList   Other-0.161127 %77 %
117Uses JSON-LD ListItem   Other-0.161128 %77 %
118Uses JSON-LD Organization   Other-0.161124 %81 %
119Variations in A Tag HREF Attributes   Relevancy-0.1612263839 %91 %
120Percentage of DoFollow Internal Links   Authority-0.16886965 %71 %
121Has Entities in H3 Tags   Relevancy-0.161129 %88 %
122Variations in Distinct A Tag HREF Attributes   Relevancy-0.168352439 %91 %
123Page Size Kilobytes   Size-0.1686430570 %50 %
124Number Of Claimed Brands   Other-0.1628219 %84 %
125Number of Absolute URLs   Authority-0.16105725571 %63 %
126Variations in Meta Description   Relevancy-0.1641241 %74 %
127Number of Meta Generator Tags   Technology-0.162125 %70 %
128Inline CSS Kilobytes   Size-0.162745756 %84 %
129Number of Questions In H2 Tags   Size-0.164118 %84 %
130Uses JSON-LD datePublished   Other-0.161124 %74 %
131Variations in OpenGraph Title   Relevancy-0.1611140 %65 %
132Uses JSON-LD WebSite-0.161123 %76 %
133Exact Matches in the HTML Tag   Relevancy-0.15162720 %82 %
134Number of Email Addresses   Trust-0.1526436 %81 %
135Variations in the Canonical URL   Relevancy-0.1543134 %85 %
136Number of Questions In H3 Tags   Size-0.155115 %80 %
137Has Email   Trust-0.151135 %75 %
138Uses Schema webpage   Other-0.151124 %74 %
139Uses Schema datemodified   Other-0.151123 %69 %
140Has Meta Viewport   Technology-0.151169 %75 %
141Leading Variations in Title Tag   Relevancy-0.151123 %81 %
142Is Store Page   Other-0.151136 %66 %
143Uses JSON-LD dateModified   Other-0.151123 %71 %
144Number of HREF Lang Tags   Size-0.1529210 %83 %
145Inline JavaScript Kilobytes   Size-0.1549512166 %43 %
146Uses JSON-LD WebPage   Other-0.151123 %75 %
147Uses JSON-LD ImageObject   Other-0.151123 %77 %
148Leading Variations in H2 Tags   Relevancy-0.153117 %82 %
149Has Google Verify   Technology-0.151114 %80 %
150Number of Questions   Size-0.151091357 %62 %
151Uses JSON-LD SearchAction   Other-0.151117 %74 %
152Uses Schema name   Other-0.151149 %56 %
153Entities in Title Tag   Relevancy-0.158247 %84 %
154Is OpenGraph Type Article   Technology-0.151123 %64 %
155Uses Schema searchaction   Other-0.151117 %73 %
156Has HREF Lang   Technology-0.151111 %80 %
157Exact Matches in H1-H6 Tags   Relevancy-0.159113 %84 %
158Number of Nofollow Links   Authority-0.1541316 %81 %
159Variations in OpenGraph Description   Relevancy-0.1538237 %71 %
160Exact Matches in Top 30KB   Relevancy-0.1417213 %79 %
161Variations making whole H1-H6 Tags   Relevancy-0.143111 %82 %
162Uses Schema image   Other-0.141115 %75 %
163Variations in Script Tags   Relevancy-0.1418717947 %75 %
164Variations in Absolute URLs   Relevancy-0.145334843 %90 %
165Has Schema Markup   Relevancy-0.141153 %55 %
166Word Count in Meta Description   Size-0.14631958 %62 %
167Has Canonical URL   Authority-0.141160 %60 %
168Number of H5 Tags   Size-0.1411211 %85 %
169Is Pagination Page   Other-0.141115 %68 %
170Uses Schema inlanguage   Other-0.141123 %69 %
171LSI Words in Meta Description Tag   Relevancy-0.1430944 %86 %
172Has Terms of Service   Trust-0.141129 %58 %
173Uses JSON-LD inLanguage   Other-0.141123 %70 %
174Uses JSON-LD mainEntity   Other-0.14111 %12 %
175Uses Schema telephone   Other-0.141115 %73 %
176Variations in Footer Tags   Relevancy-0.1448262226 %84 %
177Variations making whole H1, H2, and H3 Tags   Relevancy-0.142110 %82 %
178LSI Words in H4 Tags   Relevancy-0.1452518 %87 %
179Variations in First 100 Words   Relevancy-0.14186645 %82 %
180Uses Schema breadcrumblist   Other-0.141134 %44 %
181Title Word Count   Size-0.1423870 %59 %
182Number of Prices   Size-0.14104410458 %75 %
183Meta Description Length   Size-0.1435411658 %65 %
184Uses JSON-LD image   Other-0.141112 %77 %
185Uses Schema listitem   Other-0.141135 %44 %
186Variations in Strong Tags   Relevancy-0.1496218 %85 %
187Entities in Meta Description Tag   Relevancy-0.149341 %81 %
188Number of NoFollow External Links   Authority-0.1433211 %81 %
189Uses JSON-LD item-0.141119 %72 %
190Variations in Search Result Summary   Relevancy-0.1443257 %63 %
191Title Length   Size-0.141685370 %60 %
192Uses Schema url   Other-0.131145 %54 %
193Uses Schema postalcode   Other-0.131113 %72 %
194Uses Schema aggregaterating   Other-0.13118 %66 %
195Uses Schema description   Other-0.131138 %48 %
196Has FavIcon   Technology-0.131162 %59 %
197Percentage of NoFollow Links   Authority-0.135214 %80 %
198Has Meta Description   Relevancy-0.131156 %58 %
199Uses Schema addresslocality   Other-0.131114 %69 %
200Variation Density in Top 30KB   Relevancy-0.13300445 %67 %