Measures 151098 SEO Factors

149376 Built-In SEO Factors

140161 On-page SEO Factors

9215 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 2026-06     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-0.2486224982 %75 %
2Load Time Milliseconds   Performance-0.2215487159084 %89 %
3Number of Referring Domains   Authority-0.224855021141 %88 %
4Number of Backlinks   Authority-0.22227556945097341 %87 %
5Number of Top 200 Shared Factors Used   Diversity-0.21523795 %90 %
6Number of Do Follow Backlinks   Authority-0.21225040954349937 %87 %
7Number of Top 50 Shared Factors Used   Diversity-0.21161294 %87 %
8Number of Top 100 Shared Factors Used   Diversity-0.21382895 %90 %
9Search Result Domain is .com, .net, or .org   Other-0.2116 %74 %
10Variations in H1, H2, and H3 Tags   Relevancy-0.2192859 %80 %
11Variations in H1-H6 Tags   Relevancy-0.2231959 %81 %
12Number of No Follow Backlinks   Authority-0.24373255897828 %84 %
13Number of Unique Variations Used   Diversity-0.2521178 %79 %
14Variations in H1 and H2 Tags   Relevancy-0.19113557 %81 %
15Clean Text Kilobytes   Size-0.19981270 %88 %
16Search Result Domain is .com   Other-0.19116 %78 %
17Unabridged Word Count   Size-0.1916706172684 %85 %
18Variations in P Tags   Relevancy-0.1945535061 %84 %
19Word Count   Size-0.193779132984 %85 %
20Number of P Tags   Size-0.191033569 %83 %
21Number of Heading Tags   Size-0.181171971 %81 %
22Number of Includes   Technology-0.18522577 %78 %
23Variations in Search Result Document File Name   Relevancy-0.1810144 %83 %
24Variations in Div Tags   Relevancy-0.182826024370 %84 %
25Number of Images   Size-0.181362470 %84 %
26Number of H2 Tags   Size-0.1821765 %83 %
27Entities in H2 Tags-0.1850648 %88 %
28Number of Distinct Entities Used   Diversity-0.18642773 %89 %
29Number of H1 Tags   Size-0.183167 %86 %
30Number of Factors Used   Diversity-0.1851918995 %85 %
31Variations in LI Tags   Relevancy-0.1842033359 %81 %
32Number of Images with ALT Text   Size-0.181221765 %89 %
33Variations in H2 Tags   Relevancy-0.1898444 %80 %
34Has Meta Charset   Technology-0.181171 %81 %
35Entities in Sentences   Relevancy-0.1847712363 %90 %
36Number of DoFollow External Links   Authority-0.18561273 %87 %
37Entities in the HTML Tag   Relevancy-0.1748212568 %90 %
38Number of HTML Tags   Size-0.17307395384 %84 %
39Number of Facebook Pages   Authority-0.177253 %86 %
40Number of External Links   Authority-0.17601374 %89 %
41LSI Words in Sentences   Relevancy-0.17251460662 %90 %
42Variations in H1 Tags   Relevancy-0.1715151 %82 %
43Variations in A Tags   Relevancy-0.1745524259 %81 %
44Leading Variations in H1-H6 Tags   Relevancy-0.1712243 %79 %
45Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1711241 %79 %
46Variations in Body Tags   Relevancy-0.179473170476 %81 %
47Number of DoFollow Links   Authority-0.1757812979 %90 %
48Number of Links   Authority-0.1758513279 %86 %
49Number of HTTPS Links   Authority-0.1758513178 %90 %
50Has JSON-LD Schema Markup   Relevancy-0.171150 %80 %
51Variations in Search Result URL Path   Relevancy-0.1713147 %81 %
52Variations in HTML Tags   Relevancy-0.169473169075 %83 %
53Entities in H3 Tags-0.1653638 %88 %
54Variation Count in Top 30KB   Relevancy-0.1652445765 %86 %
55Variations in A Tag HREF Attributes   Relevancy-0.1617404954 %83 %
56Number of Internal Links   Authority-0.1657311977 %89 %
57Variations in Distinct A Tag HREF Attributes   Relevancy-0.1612223155 %83 %
58Average Words Per Sentence   Size-0.161682876 %87 %
59Has Entities in H2 Tags   Relevancy-0.161149 %84 %
60Entities in Title Tag   Relevancy-0.166362 %88 %
61Number of CSS Includes   Technology-0.1624970 %78 %
62Number of H3 Tags   Size-0.1638854 %81 %
63LSI Words in H2 Tags   Relevancy-0.161041750 %88 %
64Term Frequency   Relevancy-0.166375 %81 %
65Entities in H1 Tags-0.1613249 %88 %
66Variations in Search Result Link Text   Relevancy-0.168279 %77 %
67Number of Instagram Pages   Authority-0.1615241 %83 %
68Number of HTML Comments   Size-0.167325168 %82 %
69Variations in Span Tags   Relevancy-0.167991245 %84 %
70Variations in Sentences   Relevancy-0.1624415569 %84 %
71Variations in Main Tags   Relevancy-0.161392310236 %80 %
72Flesch Kincaid Reading Grade Level   Other-0.166290 %89 %
73Number of Images without ALT Text   Size-0.1646851 %84 %
74Variations in Search Result Display URL   Relevancy-0.168279 %81 %
75Number of LinkedIn Pages   Authority-0.157128 %85 %
76Variations in ALT Attributes   Relevancy-0.15158739 %79 %
77Number of Forms   Technology-0.1518246 %74 %
78Variations in Search Result URL   Relevancy-0.1522255 %78 %
79Has Entities in H1 Tags   Relevancy-0.151151 %85 %
80Variations in Absolute URLs   Relevancy-0.1571339259 %86 %
81Variations in Nav Tags   Relevancy-0.1572385144 %79 %
82Variations in the Canonical URL   Relevancy-0.1562248 %81 %
83Variations in First 100 Words   Relevancy-0.15184865 %83 %
84Variations in the Title Tag   Relevancy-0.1515264 %78 %
85Search Result Number of Dirs in Path   Other-0.153275 %80 %
86Variations in OpenGraph Title   Relevancy-0.1513255 %72 %
87Number of Facebook Accounts   Authority-0.152125 %83 %
88Number of Sentences   Size-0.1562113682 %77 %
89Variations in H3 Tags   Relevancy-0.1592332 %79 %
90Has Form   Technology-0.151145 %72 %
91Number Of JSON-LD Types   Relevancy-0.15761354 %83 %
92Number of Questions In Headings   Size-0.158236 %85 %
93Percentage of DoFollow External Links   Authority-0.14321272 %83 %
94Number of Social Pages   Authority-0.1418460 %88 %
95Variations in Section Tags   Relevancy-0.1415222535 %84 %
96Search Result Host Length   Size-0.14241784 %75 %
97Number of Social Accounts   Authority-0.144238 %86 %
98Percentage of DoFollow Links   Authority-0.141008379 %83 %
99LSI Words in H1 Tags   Relevancy-0.1429452 %90 %
100Number of Questions In H2 Tags   Size-0.143124 %79 %
101Search Result Domain Length   Size-0.14241784 %79 %
102Number of US Phone Numbers   Trust-0.1411541434 %80 %
103Leading Variations in H1 Tags   Relevancy-0.141127 %80 %
104Clean Keyword Density in the HTML Tag   Relevancy-0.14194568 %70 %
105TF/IDF   Relevancy-0.141156 %79 %
106Headings Has Question   Other-0.141137 %81 %
107Exact Matches in the HTML Tag   Relevancy-0.142641628 %82 %
108Number of JavaScript Includes   Technology-0.14421779 %78 %
109Search Result Uses HTTPS   Other-0.141183 %77 %
110Variation Density in Top 30KB   Relevancy-0.14320562 %76 %
111Has Entities in H3 Tags   Relevancy-0.141139 %82 %
112LSI Words in H3 Tags   Relevancy-0.14951742 %85 %
113Has Meta Viewport   Technology-0.141181 %72 %
114Variations in Meta Description   Relevancy-0.1445253 %80 %
115Search Result Summary Length   Size-0.1416015194 %76 %
116Number of Twitter Accounts   Authority-0.131118 %77 %
117Uses JSON-LD name   Other-0.131151 %77 %
118Has US Phone Number   Trust-0.131135 %75 %
119Is Home Page   Other-0.131115 %54 %
120Variations in Footer Tags   Relevancy-0.1351282835 %81 %
121Variations making whole H1-H6 Tags   Relevancy-0.132116 %73 %
122Has Meta Robots   Other-0.131124 %74 %
123Number of H4 Tags   Size-0.1346332 %76 %
124Inline CSS Kilobytes   Size-0.132246165 %81 %
125Has Apple Touch Icon   Technology-0.131148 %77 %
126Leading Variations in Title Tag   Relevancy-0.131132 %75 %
127Variations in OpenGraph Description   Relevancy-0.1342249 %78 %
128Leading Variations in H2 Tags   Relevancy-0.1310122 %84 %
129Exact Matches in Top 30KB   Relevancy-0.1314218 %81 %
130Number of Absolute URLs   Authority-0.13152425883 %68 %
131Exact Matches in H1-H6 Tags   Relevancy-0.139120 %80 %
132Number of Questions   Size-0.13821568 %70 %
133Entities in Meta Description Tag   Relevancy-0.137352 %83 %
134Is Article Page   Other-0.131142 %75 %
135Variations Making Whole LI Tags   Relevancy-0.136122 %75 %
136Variations in Script Tags   Relevancy-0.133373318763 %77 %
137Percentage of DoFollow Internal Links   Authority-0.13917277 %77 %
138Variations making whole A Tags   Relevancy-0.135127 %75 %
139Variations in Strong Tags   Relevancy-0.12233324 %79 %
140Number Of Claimed Brands   Other-0.1214223 %79 %
141Number of Email Addresses   Trust-0.1230442 %80 %
142Title Tag Has Entities   Relevancy-0.121162 %79 %
143Has FavIcon   Technology-0.121175 %70 %
144Number of HREF Lang Tags   Size-0.1224211 %78 %
145Variations Making Whole Span Tags   Relevancy-0.129119 %80 %
146Uses JSON-LD url   Other-0.121145 %75 %
147Variations making whole H1, H2, and H3 Tags   Relevancy-0.121114 %73 %
148Uses Schema datemodified   Other-0.121131 %63 %
149Uses JSON-LD description   Other-0.121141 %74 %
150Page Size Kilobytes   Size-0.1287232183 %64 %
151Has Contact Page   Trust-0.121160 %67 %
152Entities in H4 Tags-0.1210217 %84 %
153Uses JSON-LD representativeOfPage   Other-0.12111 %14 %
154Variations in Article Tags   Relevancy-0.1217601824 %77 %
155Variations in I Tags   Relevancy-0.12215419 %80 %
156Variations in the last 100 words   Relevancy-0.12187549 %75 %
157Number of Prices   Size-0.125699167 %79 %
158Has HREF Lang   Technology-0.121112 %74 %
159Uses Schema representativeofpage   Other-0.12111 %14 %
160Uses JSON-LD dateModified   Other-0.121130 %70 %
161Uses Schema website   Other-0.121133 %63 %
162Variations in Button Tags   Relevancy-0.121065611 %77 %
163Variations in ID Attributes   Relevancy-0.12688414 %79 %
164Uses JSON-LD datePublished   Other-0.121132 %71 %
165Has Canonical URL   Authority-0.121172 %72 %
166Leading Variations in H3 Tags   Relevancy-0.128116 %79 %
167Variations in H4-H6 Tags   Relevancy-0.1256216 %77 %
168Uses JSON-LD Organization   Other-0.121130 %76 %
169Uses Schema webpage   Other-0.121132 %64 %
170Uses Schema organization   Other-0.121133 %68 %
171Number of Nofollow Links   Authority-0.1120321 %81 %
172Uses JSON-LD ListItem   Other-0.111133 %70 %
173Word Count in Meta Description   Size-0.11532067 %68 %
174LSI Words in Title Tag   Relevancy-0.1114565 %85 %
175Uses JSON-LD ImageObject   Other-0.111130 %71 %
176Has Privacy Policy   Trust-0.111154 %67 %
177Uses JSON-LD mainEntity   Other-0.11111 %17 %
178Uses Schema faqpage   Other-0.11119 %63 %
179Has Email   Trust-0.111142 %76 %
180Has Meta Description   Relevancy-0.111166 %64 %
181Uses JSON-LD BreadcrumbList   Other-0.111133 %71 %
182Number of H5 Tags   Size-0.1137214 %74 %
183Has OpenGraph Type   Relevancy-0.111162 %67 %
184Variations in Class Attributes   Relevancy-0.1196874520 %79 %
185LSI Words in Meta Description Tag   Relevancy-0.1128953 %86 %
186Uses JSON-LD WebPage   Other-0.111129 %70 %
187Uses JSON-LD WebSite   Other-0.111131 %71 %
188Uses Schema answer   Other-0.11119 %61 %
189Uses Schema inlanguage   Other-0.111129 %60 %
190Number of Meta Generator Tags   Technology-0.112132 %73 %
191Has Google Verify   Technology-0.111118 %66 %
192Number of NoFollow External Links   Authority-0.1119214 %82 %
193Number of Questions In H3 Tags   Size-0.115117 %80 %
194Number of YouTube Accounts   Technology-0.11217 %77 %
195Has DocType Tag   Technology-0.111177 %50 %
196Uses Schema postalcode   Other-0.111115 %60 %
197Meta Description Length   Size-0.1129112367 %73 %
198Uses Schema question   Other-0.11119 %63 %
199Variations in H4 Tags   Relevancy-0.1135112 %73 %
200LSI Words in H4 Tags   Relevancy-0.1149623 %80 %