Measures 151091 SEO Factors

149369 Built-In SEO Factors

140154 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-0.2486224582 %75 %
2Load Time Milliseconds   Performance-0.2215487159584 %89 %
3Number of Referring Domains   Authority-0.224855021040 %88 %
4Number of Backlinks   Authority-0.21227556945194540 %87 %
5Number of Top 200 Shared Factors Used   Diversity-0.21523795 %90 %
6Number of Top 50 Shared Factors Used   Diversity-0.21161294 %87 %
7Number of Top 100 Shared Factors Used   Diversity-0.21382895 %90 %
8Number of Do Follow Backlinks   Authority-0.21225040954434937 %87 %
9Search Result Domain is .com, .net, or .org   Other-0.2116 %74 %
10Variations in H1, H2, and H3 Tags   Relevancy-0.2192759 %80 %
11Variations in H1-H6 Tags   Relevancy-0.2231959 %80 %
12Number of Unique Variations Used   Diversity-0.19521178 %79 %
13Number of No Follow Backlinks   Authority-0.194373255915827 %84 %
14Variations in H1 and H2 Tags   Relevancy-0.19113557 %81 %
15Search Result Domain is .com   Other-0.19116 %78 %
16Clean Text Kilobytes   Size-0.19981270 %88 %
17Unabridged Word Count   Size-0.1916706172284 %85 %
18Variations in P Tags   Relevancy-0.1945535061 %85 %
19Word Count   Size-0.193779132384 %85 %
20Number of P Tags   Size-0.191033569 %83 %
21Number of Includes   Technology-0.19522577 %77 %
22Number of Heading Tags   Size-0.181171971 %81 %
23Variations in Div Tags   Relevancy-0.182826024670 %84 %
24Variations in Search Result Document File Name   Relevancy-0.1810144 %83 %
25Number of H2 Tags   Size-0.1821765 %83 %
26Number of Images   Size-0.181362470 %84 %
27Number of Distinct Entities Used   Diversity-0.18642773 %89 %
28Number of H1 Tags   Size-0.183166 %86 %
29Entities in H2 Tags-0.1850648 %88 %
30Variations in LI Tags   Relevancy-0.1842033359 %80 %
31Number of Factors Used   Diversity-0.1851918995 %85 %
32Has Meta Charset   Technology-0.181171 %81 %
33Number of Images with ALT Text   Size-0.181221765 %89 %
34Entities in Sentences   Relevancy-0.1847712163 %89 %
35Variations in H2 Tags   Relevancy-0.1898444 %80 %
36Number of DoFollow External Links   Authority-0.18561273 %88 %
37Number of Facebook Pages   Authority-0.177253 %86 %
38Entities in the HTML Tag   Relevancy-0.1748212368 %89 %
39Number of HTML Tags   Size-0.17307394984 %84 %
40Number of External Links   Authority-0.17601374 %90 %
41Variations in A Tags   Relevancy-0.1745524259 %81 %
42Leading Variations in H1-H6 Tags   Relevancy-0.1712243 %79 %
43LSI Words in Sentences   Relevancy-0.17251459561 %90 %
44Variations in H1 Tags   Relevancy-0.1715151 %82 %
45Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1711241 %79 %
46Has JSON-LD Schema Markup   Relevancy-0.171150 %79 %
47Number of DoFollow Links   Authority-0.1757812979 %89 %
48Number of Links   Authority-0.1758513279 %86 %
49Variations in Body Tags   Relevancy-0.179473171476 %81 %
50Number of HTTPS Links   Authority-0.1758513078 %89 %
51Entities in H3 Tags-0.1653638 %88 %
52Variation Count in Top 30KB   Relevancy-0.1652445865 %86 %
53Variations in Search Result URL Path   Relevancy-0.1613147 %81 %
54Variations in HTML Tags   Relevancy-0.169473169974 %83 %
55Variations in A Tag HREF Attributes   Relevancy-0.1617404954 %82 %
56Number of Internal Links   Authority-0.1657311977 %88 %
57Average Words Per Sentence   Size-0.161682876 %87 %
58Variations in Distinct A Tag HREF Attributes   Relevancy-0.1612223155 %82 %
59Number of CSS Includes   Technology-0.1624970 %78 %
60Entities in Title Tag   Relevancy-0.166362 %88 %
61Has Entities in H2 Tags   Relevancy-0.161149 %84 %
62Number of H3 Tags   Size-0.1638854 %81 %
63Entities in H1 Tags-0.1613249 %87 %
64Term Frequency   Relevancy-0.166375 %81 %
65Flesch Kincaid Reading Grade Level   Other-0.166291 %89 %
66Number of Instagram Pages   Authority-0.1615241 %83 %
67LSI Words in H2 Tags   Relevancy-0.161041650 %88 %
68Number of HTML Comments   Size-0.167325068 %82 %
69Variations in Span Tags   Relevancy-0.167991245 %84 %
70Variations in Search Result Link Text   Relevancy-0.168279 %77 %
71Variations in Main Tags   Relevancy-0.161392310235 %80 %
72Variations in Sentences   Relevancy-0.1624415569 %84 %
73Number of Images without ALT Text   Size-0.1646851 %84 %
74Number of LinkedIn Pages   Authority-0.157128 %85 %
75Variations in ALT Attributes   Relevancy-0.15158739 %79 %
76Variations in Search Result Display URL   Relevancy-0.158279 %81 %
77Number of Forms   Technology-0.1518246 %75 %
78Has Entities in H1 Tags   Relevancy-0.151151 %85 %
79Variations in Absolute URLs   Relevancy-0.1571339159 %86 %
80Variations in Search Result URL   Relevancy-0.1522254 %77 %
81Variations in First 100 Words   Relevancy-0.15184865 %83 %
82Variations in Nav Tags   Relevancy-0.1572385243 %79 %
83Search Result Number of Dirs in Path   Other-0.153275 %80 %
84Variations in the Canonical URL   Relevancy-0.1562248 %81 %
85Variations in the Title Tag   Relevancy-0.1515264 %78 %
86Number of Facebook Accounts   Authority-0.152125 %83 %
87Variations in H3 Tags   Relevancy-0.1592332 %79 %
88Has Form   Technology-0.151145 %73 %
89Number of Questions In Headings   Size-0.158236 %85 %
90Number Of JSON-LD Types   Relevancy-0.14761354 %83 %
91Number of Sentences   Size-0.1462113582 %77 %
92Variations in OpenGraph Title   Relevancy-0.1413255 %72 %
93Percentage of DoFollow External Links   Authority-0.14321272 %83 %
94Variations in Section Tags   Relevancy-0.1415222535 %84 %
95Search Result Host Length   Size-0.14241784 %75 %
96Number of Social Pages   Authority-0.1418560 %88 %
97Percentage of DoFollow Links   Authority-0.14998379 %83 %
98Number of Social Accounts   Authority-0.144239 %86 %
99LSI Words in H1 Tags   Relevancy-0.1429451 %90 %
100Search Result Domain Length   Size-0.14241784 %79 %
101Number of US Phone Numbers   Trust-0.1411541435 %80 %
102Number of Questions In H2 Tags   Size-0.143124 %80 %
103Clean Keyword Density in the HTML Tag   Relevancy-0.14194568 %70 %
104TF/IDF   Relevancy-0.141156 %79 %
105Leading Variations in H1 Tags   Relevancy-0.141127 %80 %
106Headings Has Question   Other-0.141137 %80 %
107Search Result Uses HTTPS   Other-0.141183 %78 %
108Number of JavaScript Includes   Technology-0.14421779 %78 %
109Has Meta Viewport   Technology-0.141181 %72 %
110Variation Density in Top 30KB   Relevancy-0.14320562 %77 %
111Has Entities in H3 Tags   Relevancy-0.141139 %82 %
112Exact Matches in the HTML Tag   Relevancy-0.142641628 %82 %
113Search Result Summary Length   Size-0.1416015195 %76 %
114Variations in Meta Description   Relevancy-0.1445253 %80 %
115LSI Words in H3 Tags   Relevancy-0.13951642 %85 %
116Number of Twitter Accounts   Authority-0.131118 %78 %
117Is Home Page   Other-0.131115 %54 %
118Uses JSON-LD name   Other-0.131151 %76 %
119Has US Phone Number   Trust-0.131135 %75 %
120Inline CSS Kilobytes   Size-0.132246165 %81 %
121Has Meta Robots   Other-0.131124 %74 %
122Variations in Footer Tags   Relevancy-0.1351282935 %81 %
123Variations making whole H1-H6 Tags   Relevancy-0.132116 %73 %
124Number of H4 Tags   Size-0.1346332 %76 %
125Leading Variations in Title Tag   Relevancy-0.131132 %75 %
126Variations in OpenGraph Description   Relevancy-0.1342249 %79 %
127Has Apple Touch Icon   Technology-0.131148 %76 %
128Percentage of DoFollow Internal Links   Authority-0.13917277 %77 %
129Entities in Meta Description Tag   Relevancy-0.137352 %83 %
130Is Article Page   Other-0.131142 %75 %
131Leading Variations in H2 Tags   Relevancy-0.1310122 %84 %
132Exact Matches in Top 30KB   Relevancy-0.1314218 %81 %
133Variations Making Whole LI Tags   Relevancy-0.136122 %75 %
134Number of Absolute URLs   Authority-0.13152425883 %68 %
135Exact Matches in H1-H6 Tags   Relevancy-0.139119 %80 %
136Number of Questions   Size-0.13821567 %70 %
137Variations making whole A Tags   Relevancy-0.135127 %75 %
138Variations in Script Tags   Relevancy-0.133373318963 %77 %
139Variations in Strong Tags   Relevancy-0.12233324 %79 %
140Has FavIcon   Technology-0.121175 %70 %
141Number Of Claimed Brands   Other-0.1214223 %79 %
142Title Tag Has Entities   Relevancy-0.121162 %79 %
143Number of Email Addresses   Trust-0.1230442 %80 %
144Uses JSON-LD url   Other-0.121145 %74 %
145Variations Making Whole Span Tags   Relevancy-0.129119 %79 %
146Variations making whole H1, H2, and H3 Tags   Relevancy-0.121114 %73 %
147Number of HREF Lang Tags   Size-0.1224211 %79 %
148Uses JSON-LD description   Other-0.121141 %73 %
149Uses Schema datemodified   Other-0.121131 %63 %
150Page Size Kilobytes   Size-0.1287232183 %64 %
151Has Contact Page   Trust-0.121160 %67 %
152Variations in I Tags   Relevancy-0.12215519 %80 %
153Variations in Article Tags   Relevancy-0.1217601824 %77 %
154Entities in H4 Tags-0.1210217 %85 %
155Variations in the last 100 words   Relevancy-0.12187549 %76 %
156Number of Prices   Size-0.125699167 %79 %
157Uses JSON-LD representativeOfPage   Other-0.12111 %14 %
158Has HREF Lang   Technology-0.121112 %74 %
159Uses JSON-LD dateModified   Other-0.121130 %70 %
160Uses Schema website   Other-0.121133 %63 %
161Has Canonical URL   Authority-0.121171 %72 %
162Leading Variations in H3 Tags   Relevancy-0.128116 %78 %
163Uses JSON-LD datePublished   Other-0.121132 %71 %
164Uses JSON-LD Organization   Other-0.121130 %75 %
165Variations in H4-H6 Tags   Relevancy-0.1256216 %77 %
166Variations in Button Tags   Relevancy-0.121065611 %76 %
167Variations in ID Attributes   Relevancy-0.12688414 %79 %
168Uses Schema organization   Other-0.121133 %68 %
169Uses Schema representativeofpage   Other-0.12111 %14 %
170Uses Schema webpage   Other-0.121132 %64 %
171Uses JSON-LD ListItem   Other-0.121133 %69 %
172Word Count in Meta Description   Size-0.12532066 %68 %
173Number of Nofollow Links   Authority-0.1120321 %81 %
174Has OpenGraph Type   Relevancy-0.111162 %67 %
175Has Meta Description   Relevancy-0.111166 %65 %
176LSI Words in Title Tag   Relevancy-0.1114564 %85 %
177Has Email   Trust-0.111142 %76 %
178Has Privacy Policy   Trust-0.111154 %67 %
179Uses JSON-LD BreadcrumbList   Other-0.111133 %71 %
180Uses JSON-LD ImageObject   Other-0.111130 %70 %
181Number of H5 Tags   Size-0.1137215 %74 %
182Uses JSON-LD mainEntity   Other-0.11111 %17 %
183Uses Schema faqpage   Other-0.11118 %62 %
184LSI Words in Meta Description Tag   Relevancy-0.1128953 %86 %
185Uses Schema inlanguage   Other-0.111129 %60 %
186Variations in Class Attributes   Relevancy-0.1196874619 %79 %
187Uses JSON-LD WebPage   Other-0.111129 %71 %
188Uses JSON-LD WebSite   Other-0.111131 %72 %
189Number of Questions In H3 Tags   Size-0.115117 %80 %
190Uses Schema answer   Other-0.11119 %61 %
191Meta Description Length   Size-0.1129112366 %73 %
192Has DocType Tag   Technology-0.111177 %51 %
193Number of NoFollow External Links   Authority-0.1119214 %81 %
194Has Google Verify   Technology-0.111118 %65 %
195Number of YouTube Accounts   Technology-0.11217 %77 %
196Number of Meta Generator Tags   Technology-0.112132 %74 %
197Uses Schema postalcode   Other-0.111115 %60 %
198Variations in H4 Tags   Relevancy-0.1135112 %73 %
199Is Category Page   Other-0.111113 %68 %
200Uses JSON-LD postalCode   Other-0.111114 %66 %