Measures 153923 SEO Factors

152201 Built-In SEO Factors

142981 On-page SEO Factors

9220 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 2026-07     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-0.2993825263 %77 %
2Number of Top 200 Shared Factors Used   Diversity-0.26523676 %89 %
3Number of Top 100 Shared Factors Used   Diversity-0.26392776 %90 %
4Number of Referring Domains   Authority-0.269845330 %87 %
5Number of Top 50 Shared Factors Used   Diversity-0.26161176 %91 %
6Load Time Milliseconds   Performance-0.2526541221065 %87 %
7Number of P Tags   Size-0.252183652 %88 %
8Number of Heading Tags   Size-0.25591953 %86 %
9Number of Backlinks   Authority-0.25197596269430 %87 %
10Word Count   Size-0.2512278140065 %87 %
11Number of Do Follow Backlinks   Authority-0.25188984248627 %87 %
12Clean Text Kilobytes   Size-0.252841352 %86 %
13Entities in Sentences   Relevancy-0.2595414650 %93 %
14Unabridged Word Count   Size-0.2556122194565 %87 %
15Variations in H1-H6 Tags   Relevancy-0.252921042 %82 %
16Variations in H1, H2, and H3 Tags   Relevancy-0.25259941 %83 %
17Entities in the HTML Tag   Relevancy-0.25105015055 %93 %
18Number of H2 Tags   Size-0.2429747 %86 %
19Variations in P Tags   Relevancy-0.2440146742 %86 %
20Number of Images   Size-0.241652553 %87 %
21Has Meta Charset   Technology-0.241153 %81 %
22Variations in H1 and H2 Tags   Relevancy-0.24123540 %83 %
23Entities in H2 Tags-0.2454735 %92 %
24Number of Unique Variations Used   Diversity-0.24591259 %79 %
25Number of HTML Tags   Size-0.24417297865 %88 %
26Variations in Div Tags   Relevancy-0.243586446851 %87 %
27Number of Distinct Entities Used   Diversity-0.24682859 %92 %
28Variations in LI Tags   Relevancy-0.2317433942 %85 %
29Variations in Search Result Document File Name   Relevancy-0.237133 %81 %
30Number of Images with ALT Text   Size-0.23851649 %87 %
31Variations in A Tags   Relevancy-0.2354226843 %81 %
32Number of No Follow Backlinks   Authority-0.232628124620 %83 %
33Number of H1 Tags   Size-0.2311149 %87 %
34Number of DoFollow Links   Authority-0.2341912259 %87 %
35Number of HTTPS Links   Authority-0.2341912459 %87 %
36Number of Links   Authority-0.2345212559 %87 %
37Number of Internal Links   Authority-0.2339011258 %87 %
38Variation Count in Top 30KB   Relevancy-0.2354787746 %80 %
39Number of External Links   Authority-0.231351355 %88 %
40Number of Factors Used   Diversity-0.2329617176 %85 %
41Variations in Body Tags   Relevancy-0.2294781104157 %83 %
42Number of DoFollow External Links   Authority-0.221341254 %89 %
43Has JSON-LD Schema Markup   Relevancy-0.221136 %76 %
44Search Result Number of Dirs in Path   Other-0.223259 %80 %
45Has Entities in H2 Tags   Relevancy-0.221136 %86 %
46Variations in H1 Tags   Relevancy-0.2211136 %79 %
47Has Entities in H1 Tags   Relevancy-0.221137 %84 %
48Average Words Per Sentence   Size-0.222873056 %86 %
49Variations in Search Result URL Path   Relevancy-0.228235 %80 %
50Entities in H1 Tags-0.2217237 %89 %
51LSI Words in Sentences   Relevancy-0.22446661646 %92 %
52Entities in Title Tag   Relevancy-0.2210349 %90 %
53Variations in HTML Tags   Relevancy-0.2294781100956 %86 %
54Variations in Distinct A Tag HREF Attributes   Relevancy-0.2215294340 %84 %
55Entities in H3 Tags-0.2251929 %93 %
56Variations in H2 Tags   Relevancy-0.22117431 %81 %
57Variations in A Tag HREF Attributes   Relevancy-0.2222546740 %84 %
58Number of Images without ALT Text   Size-0.22113939 %85 %
59Leading Variations in H1-H6 Tags   Relevancy-0.2118231 %82 %
60Leading Variations in H1, H2, and H3 Tags   Relevancy-0.2113229 %82 %
61Number of H3 Tags   Size-0.2137840 %87 %
62Search Result Domain is .com, .net, or .org   Other-0.21116 %80 %
63Number of HTML Comments   Size-0.215635051 %85 %
64Flesch Kincaid Reading Grade Level   Other-0.216171 %87 %
65Number of Facebook Pages   Authority-0.215238 %85 %
66Variations in Sentences   Relevancy-0.2141267950 %86 %
67Search Result Domain is .com   Other-0.21116 %79 %
68Number Of JSON-LD Types   Relevancy-0.211511439 %82 %
69Number of Includes   Technology-0.21602560 %82 %
70Term Frequency   Relevancy-0.216355 %83 %
71Variations in Span Tags   Relevancy-0.218341833 %87 %
72Percentage of DoFollow Links   Authority-0.2998059 %81 %
73Variations in Main Tags   Relevancy-0.22030821526 %83 %
74Variations in Absolute URLs   Relevancy-0.2919611943 %83 %
75Variations in ALT Attributes   Relevancy-0.2247830 %78 %
76Number of Forms   Technology-0.215234 %78 %
77LSI Words in H2 Tags   Relevancy-0.21931736 %90 %
78Variations in the Canonical URL   Relevancy-0.246235 %82 %
79Number of Social Pages   Authority-0.223544 %84 %
80Clean Keyword Density in the HTML Tag   Relevancy-0.2195749 %71 %
81Number of Sentences   Size-0.2117514462 %83 %
82Percentage of DoFollow External Links   Authority-0.2321253 %81 %
83Variations in Nav Tags   Relevancy-0.2118169831 %82 %
84Has Form   Technology-0.21133 %76 %
85Variations in First 100 Words   Relevancy-0.19172847 %81 %
86Number of Instagram Pages   Authority-0.1921329 %82 %
87Variations in H3 Tags   Relevancy-0.19195524 %82 %
88Number of CSS Includes   Technology-0.1925953 %74 %
89Search Result Uses HTTPS   Other-0.191163 %74 %
90Number of Questions In Headings   Size-0.198224 %81 %
91Has Entities in H3 Tags   Relevancy-0.191129 %86 %
92Number of LinkedIn Pages   Authority-0.194121 %80 %
93Variations in Search Result URL   Relevancy-0.1923242 %77 %
94Uses JSON-LD name   Other-0.191136 %76 %
95Percentage of DoFollow Internal Links   Authority-0.19926958 %76 %
96Search Result Domain Length   Size-0.19231664 %77 %
97Number of Social Accounts   Authority-0.196227 %83 %
98Search Result Host Length   Size-0.19231664 %77 %
99Has Meta Viewport   Technology-0.191161 %77 %
100Number of Facebook Accounts   Authority-0.193117 %79 %
101Entities in Meta Description Tag   Relevancy-0.1914341 %84 %
102Variations in Section Tags   Relevancy-0.1916063425 %86 %
103LSI Words in H1 Tags   Relevancy-0.1933437 %89 %
104Has Apple Touch Icon   Technology-0.191133 %73 %
105Page Size Kilobytes   Size-0.1999432263 %65 %
106Headings Has Question   Other-0.181125 %79 %
107Variations in Footer Tags   Relevancy-0.1848964926 %80 %
108Number of JavaScript Includes   Technology-0.18481861 %83 %
109Inline CSS Kilobytes   Size-0.182245950 %81 %
110Title Tag Has Entities   Relevancy-0.181148 %78 %
111Variations in Meta Description   Relevancy-0.1839239 %76 %
112Variation Density in Top 30KB   Relevancy-0.18328645 %74 %
113Has Canonical URL   Authority-0.181153 %66 %
114Variations in the Title Tag   Relevancy-0.1812246 %77 %
115Variations in OpenGraph Description   Relevancy-0.1843236 %73 %
116Is Article Page   Other-0.181128 %70 %
117Variations in Script Tags   Relevancy-0.182198623847 %81 %
118Has Privacy Policy   Trust-0.181141 %72 %
119Variations in OpenGraph Title   Relevancy-0.1810239 %72 %
120Uses JSON-LD url   Other-0.181133 %74 %
121Leading Variations in H1 Tags   Relevancy-0.181118 %77 %
122LSI Words in H3 Tags   Relevancy-0.181702030 %90 %
123Uses Schema organization   Other-0.181124 %72 %
124TF/IDF   Relevancy-0.181140 %81 %
125Uses JSON-LD description   Other-0.171128 %71 %
126Number of Absolute URLs   Authority-0.17194825663 %73 %
127Has Contact Page   Trust-0.171145 %68 %
128Variations in Search Result Display URL   Relevancy-0.1714260 %71 %
129Variations in Search Result Link Text   Relevancy-0.1714260 %71 %
130Has FavIcon   Technology-0.171154 %70 %
131Number of Questions   Size-0.17811348 %73 %
132Uses JSON-LD ListItem   Other-0.171123 %72 %
133Variations making whole A Tags   Relevancy-0.1725220 %78 %
134Inline JavaScript Kilobytes   Size-0.1761613460 %65 %
135Search Result URL Length   Size-0.171006575 %60 %
136Uses JSON-LD Organization   Other-0.171122 %74 %
137Variations Making Whole Span Tags   Relevancy-0.176114 %81 %
138Uses JSON-LD BreadcrumbList   Other-0.171122 %73 %
139Number of H4 Tags   Size-0.1731323 %81 %
140Word Count in Meta Description   Size-0.17571848 %72 %
141LSI Words in Title Tag   Relevancy-0.1724547 %83 %
142Has Meta Description   Relevancy-0.171147 %64 %
143Variations Making Whole LI Tags   Relevancy-0.177117 %78 %
144Meta Description Length   Size-0.1733411349 %71 %
145Search Result Summary Length   Size-0.1716114874 %76 %
146Number of US Phone Numbers   Trust-0.17485927 %83 %
147Number of Questions In H2 Tags   Size-0.174116 %80 %
148Has Schema Markup   Relevancy-0.161146 %62 %
149Has Meta Robots   Other-0.161118 %70 %
150Title Word Count   Size-0.1628864 %69 %
151Is Store Page   Other-0.161133 %66 %
152Has US Phone Number   Trust-0.161127 %77 %
153Leading Variations in Title Tag   Relevancy-0.161121 %77 %
154Uses Schema name   Other-0.161142 %62 %
155LSI Words in Meta Description Tag   Relevancy-0.1624939 %87 %
156Number of Prices   Size-0.16373812952 %79 %
157Number of Twitter Accounts   Authority-0.162113 %78 %
158Uses Schema datemodified   Other-0.161120 %67 %
159Title Length   Size-0.161705364 %70 %
160Number of Questions In H3 Tags   Size-0.165213 %81 %
161Uses JSON-LD datePublished-0.161122 %69 %
162Leading Variations in H2 Tags   Relevancy-0.166116 %79 %
163Uses JSON-LD dateModified   Other-0.161120 %69 %
164Meta Description Tag Has Entities   Relevancy-0.161140 %73 %
165Variations in Strong Tags   Relevancy-0.16129316 %83 %
166Variations making whole H1, H2, and H3 Tags   Relevancy-0.162110 %77 %
167Has OpenGraph Type   Relevancy-0.161146 %64 %
168Has Google Verify   Technology-0.161113 %72 %
169Has Terms of Service   Trust-0.161130 %65 %
170Variations making whole H1-H6 Tags   Relevancy-0.163111 %78 %
171Number of Email Addresses   Trust-0.1640431 %78 %
172Variations in Article Tags   Relevancy-0.1647262716 %75 %
173Variations in the last 100 words   Relevancy-0.16179537 %74 %
174Has OpenGraph Image   Relevancy-0.161141 %65 %
175Uses Schema webpage   Other-0.161121 %70 %
176Is Purchase Page   Other-0.161135 %55 %
177Uses JSON-LD ImageObject   Other-0.161121 %73 %
178Variations in Search Result Summary   Relevancy-0.1548360 %66 %
179Is OpenGraph Type Article   Technology-0.151120 %65 %
180Variations in Button Tags   Relevancy-0.1533122611 %80 %
181Uses JSON-LD WebPage   Other-0.151121 %71 %
182Uses Schema url   Other-0.151139 %60 %
183Uses Schema product   Other-0.15117 %48 %
184Entities in H4 Tags-0.1511213 %87 %
185Variations in Class Attributes   Relevancy-0.1597049817 %80 %
186Uses Schema description   Other-0.151133 %57 %
187Has Copyright   Trust-0.151145 %59 %
188Number Of Claimed Brands   Other-0.1572216 %74 %
189Uses JSON-LD item-0.151117 %70 %
190Number of Nofollow Links   Authority-0.1591416 %75 %
191Uses JSON-LD Product   Other-0.15116 %47 %
192Has DocType Tag   Technology-0.151156 %56 %
193Has Meta Twitter Card   Authority-0.151140 %61 %
194Exact Matches in the HTML Tag   Relevancy-0.153721220 %85 %
195Uses Schema website   Other-0.151122 %65 %
196Has Email   Trust-0.151130 %70 %
197Uses JSON-LD headline-0.151113 %65 %
198Uses Schema listitem   Other-0.151128 %57 %
199Exact Matches in H1-H6 Tags   Relevancy-0.1411114 %81 %
200Uses Schema breadcrumblist   Other-0.141127 %57 %