Measures 146566 SEO Factors

144844 Built-In SEO Factors

135721 On-page SEO Factors

9123 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 2025-11     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-0.23125933981 %78 %
2Number of Top 200 Shared Factors Used   Diversity-0.22523898 %94 %
3Number of Top 100 Shared Factors Used   Diversity-0.22392998 %94 %
4Entities in Title Tag   Relevancy-0.227367 %95 %
5Number of Unique Variations Used   Diversity-0.2129777 %89 %
6Number of Distinct Entities Used   Diversity-0.211062977 %96 %
7Load Time Milliseconds   Performance-0.2132075148783 %92 %
8Number of Top 50 Shared Factors Used   Diversity-0.21171298 %93 %
9Search Result Domain is .com, .net, or .org   Other-0.21115 %77 %
10Search Result Domain is .com   Other-0.2115 %77 %
11Entities in Sentences   Relevancy-0.266915170 %96 %
12Entities in the HTML Tag   Relevancy-0.274615473 %96 %
13Variations in H1-H6 Tags   Relevancy-0.224863 %88 %
14Variations in H1, H2, and H3 Tags   Relevancy-0.221762 %87 %
15Variations in Div Tags   Relevancy-0.262511072 %92 %
16Variations in H1 and H2 Tags   Relevancy-0.211460 %87 %
17Variations in Body Tags   Relevancy-0.19179922476 %91 %
18Variations in P Tags   Relevancy-0.191313165 %89 %
19Entities in H1 Tags-0.196255 %91 %
20Variations in HTML Tags   Relevancy-0.19179922175 %91 %
21Variations in Search Result Document File Name   Relevancy-0.193143 %81 %
22Number of Referring Domains   Authority-0.19170812852 %67 %
23Number of Factors Used   Diversity-0.1933917898 %89 %
24Variations in LI Tags   Relevancy-0.191722163 %89 %
25Entities in H2 Tags-0.1931752 %92 %
26Variations in Sentences   Relevancy-0.191653370 %88 %
27Term Frequency   Relevancy-0.194375 %89 %
28Variations in A Tags   Relevancy-0.181402264 %86 %
29Variations in Search Result URL Path   Relevancy-0.183145 %82 %
30Number of Backlinks   Authority-0.18124727680652 %68 %
31Variations in the Title Tag   Relevancy-0.183263 %86 %
32Variation Count in Top 30KB   Relevancy-0.18771863 %86 %
33Clean Keyword Density in the HTML Tag   Relevancy-0.1816367 %80 %
34Leading Variations in H1-H6 Tags   Relevancy-0.1814244 %87 %
35Variations in Search Result Link Text   Relevancy-0.183280 %83 %
36Variations in Search Result Display URL   Relevancy-0.183280 %83 %
37Unabridged Word Count   Size-0.184437186183 %90 %
38Number of Images   Size-0.183063476 %89 %
39Clean Text Kilobytes   Size-0.18311375 %89 %
40Word Count   Size-0.183797147183 %89 %
41Number of Do Follow Backlinks   Authority-0.18122239608747 %67 %
42Variations in First 100 Words   Relevancy-0.1817562 %86 %
43Number of HTML Tags   Size-0.183693111183 %89 %
44Variations in the Canonical URL   Relevancy-0.187247 %84 %
45Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1811241 %88 %
46Number of Includes   Technology-0.18552779 %81 %
47Variations in H1 Tags   Relevancy-0.183153 %86 %
48LSI Words in Sentences   Relevancy-0.18370377763 %95 %
49Variations in H2 Tags   Relevancy-0.1711345 %84 %
50Number of Images with ALT Text   Size-0.172792471 %87 %
51Entities in H3 Tags-0.1743844 %93 %
52Number of Heading Tags   Size-0.17672375 %86 %
53Search Result Number of Dirs in Path   Other-0.174271 %77 %
54Has Entities in H1 Tags   Relevancy-0.171155 %87 %
55Variations in A Tag HREF Attributes   Relevancy-0.173233858 %91 %
56Variations in Distinct A Tag HREF Attributes   Relevancy-0.172442358 %91 %
57Number of P Tags   Size-0.171354074 %89 %
58Variation Density in Top 30KB   Relevancy-0.177258 %82 %
59Variations in Meta Description   Relevancy-0.174253 %84 %
60Entities in Meta Description Tag   Relevancy-0.178357 %90 %
61TF/IDF   Relevancy-0.171156 %86 %
62Variations in ALT Attributes   Relevancy-0.1755744 %84 %
63Title Tag Has Entities   Relevancy-0.171167 %88 %
64Variations in Span Tags   Relevancy-0.1741950 %89 %
65Variations in Absolute URLs   Relevancy-0.173105159 %89 %
66Number of HTTPS Links   Authority-0.1641915179 %88 %
67Number of Forms   Technology-0.1619354 %83 %
68Number of No Follow Backlinks   Authority-0.161967375740 %66 %
69Number of DoFollow Links   Authority-0.1640914779 %87 %
70Number of Links   Authority-0.1642215279 %87 %
71Variations in Search Result URL   Relevancy-0.164254 %78 %
72Variations in OpenGraph Description   Relevancy-0.164249 %82 %
73Number of Internal Links   Authority-0.1638913779 %88 %
74Leading Variations in Title Tag   Relevancy-0.161130 %81 %
75Variations in Main Tags   Relevancy-0.164846136 %87 %
76Percentage of DoFollow Links   Authority-0.16988179 %88 %
77Variations in OpenGraph Title   Relevancy-0.163153 %80 %
78Number of H1 Tags   Size-0.1611269 %88 %
79Number of CSS Includes   Technology-0.16221072 %78 %
80Exact Matches in the HTML Tag   Relevancy-0.168261227 %82 %
81Percentage of DoFollow Internal Links   Authority-0.16907178 %86 %
82Has Form   Technology-0.161153 %79 %
83Number of External Links   Authority-0.16671576 %86 %
84Number of HTML Comments   Size-0.167076171 %84 %
85Number of Facebook Pages   Authority-0.166257 %81 %
86Average Words Per Sentence   Size-0.162293277 %83 %
87Variations in Script Tags   Relevancy-0.168537061 %83 %
88Number of DoFollow External Links   Authority-0.16641375 %86 %
89Has Entities in H2 Tags   Relevancy-0.161152 %85 %
90LSI Words in Title Tag   Relevancy-0.1616564 %93 %
91Number of Images without ALT Text   Size-0.16601158 %87 %
92Number of H2 Tags   Size-0.1616767 %86 %
93Number of JavaScript Includes   Technology-0.16441880 %82 %
94Leading Variations in H1 Tags   Relevancy-0.161126 %82 %
95LSI Words in H1 Tags   Relevancy-0.1617455 %93 %
96Number of Sentences   Size-0.1558813181 %83 %
97Has Meta Charset   Technology-0.151174 %83 %
98Flesch Kincaid Reading Grade Level   Other-0.156194 %87 %
99Number of H3 Tags   Size-0.15331060 %85 %
100Has JSON-LD Schema Markup   Relevancy-0.151153 %78 %
101Variations in Nav Tags   Relevancy-0.152372445 %85 %
102Variations in H3 Tags   Relevancy-0.1516335 %84 %
103Search Result Host Length   Size-0.15251682 %80 %
104Search Result Domain Length   Size-0.15251682 %80 %
105LSI Words in Meta Description Tag   Relevancy-0.15361053 %92 %
106Exact Matches in H1-H6 Tags   Relevancy-0.1511117 %83 %
107LSI Words in H2 Tags   Relevancy-0.15842053 %92 %
108Inline CSS Kilobytes   Size-0.141916064 %84 %
109Variations in Section Tags   Relevancy-0.14911735 %83 %
110Has Meta Viewport   Technology-0.141180 %83 %
111Has Canonical URL   Authority-0.141171 %79 %
112Variations in Footer Tags   Relevancy-0.1463634 %83 %
113Leading Variations in H2 Tags   Relevancy-0.146121 %82 %
114Number of Questions In Headings   Size-0.148236 %83 %
115Search Result Uses HTTPS   Other-0.141183 %85 %
116Number of Prices   Size-0.1429627569 %82 %
117Number Of JSON-LD Types   Relevancy-0.141181456 %82 %
118Variations making whole H1-H6 Tags   Relevancy-0.142116 %79 %
119Has Entities in H3 Tags   Relevancy-0.141145 %84 %
120Entities in H4 Tags-0.1419221 %89 %
121Variations making whole H1, H2, and H3 Tags   Relevancy-0.142114 %79 %
122Number of Questions   Size-0.14811266 %77 %
123Page Size Kilobytes   Size-0.14110532382 %78 %
124Number of Absolute URLs   Authority-0.1499029182 %81 %
125Percentage of DoFollow External Links   Authority-0.14301174 %81 %
126Number of Email Addresses   Trust-0.14280543 %81 %
127Has Email   Trust-0.141143 %71 %
128Number of Social Pages   Authority-0.1414464 %81 %
129Word Count in Meta Description   Size-0.14381966 %78 %
130Meta Description Length   Size-0.1421711867 %79 %
131Has FavIcon   Technology-0.141174 %77 %
132LSI Words in H3 Tags   Relevancy-0.141272347 %91 %
133Variations in the last 100 words   Relevancy-0.1413344 %81 %
134Search Result URL Length   Size-0.14936298 %63 %
135Is Home Page   Other-0.141121 %43 %
136Variations in Meta Twitter Content   Relevancy-0.132125 %69 %
137Number of Nofollow Links   Authority-0.1344625 %77 %
138Uses JSON-LD name   Other-0.131153 %77 %
139Number of Instagram Pages   Authority-0.1312244 %78 %
140Variations Making Whole LI Tags   Relevancy-0.135124 %78 %
141Has Privacy Policy   Trust-0.131159 %74 %
142Variations in Meta Twitter Description   Relevancy-0.134124 %74 %
143Headings Has Question   Other-0.131136 %76 %
144Has OpenGraph Type   Relevancy-0.131161 %72 %
145Meta Description Tag Has Entities   Relevancy-0.131157 %83 %
146Variations making whole A Tags   Relevancy-0.136128 %78 %
147Variations in Strong Tags   Relevancy-0.1315325 %80 %
148Number of LinkedIn Pages   Authority-0.135133 %78 %
149Has Meta Description   Relevancy-0.131165 %74 %
150Is Store Page   Other-0.131146 %68 %
151Has Meta Twitter Card   Authority-0.131151 %65 %
152Title Length   Size-0.131225081 %78 %
153Variations in I Tags   Relevancy-0.1317322 %81 %
154Uses JSON-LD CollectionPage   Other-0.13115 %33 %
155Is Purchase Page   Other-0.131148 %67 %
156Title Word Count   Size-0.1318880 %77 %
157Has OpenGraph Image   Relevancy-0.131154 %70 %
158Has Schema Markup   Relevancy-0.131163 %75 %
159Number of H4 Tags   Size-0.1320436 %82 %
160Number of Questions In H3 Tags   Size-0.135117 %77 %
161Number of US Phone Numbers   Trust-0.136011141 %81 %
162Uses Schema collectionpage   Other-0.13115 %33 %
163Number of Facebook Accounts   Authority-0.133128 %79 %
164Inline JavaScript Kilobytes   Size-0.1358711979 %73 %
165Exact Matches in Top 30KB   Relevancy-0.1324215 %78 %
166Has Contact Page   Trust-0.131161 %70 %
167Uses Schema name   Other-0.131160 %72 %
168Variations Making Whole Span Tags   Relevancy-0.137119 %81 %
169Number of Social Accounts   Authority-0.1310243 %79 %
170Has Terms of Service   Trust-0.131141 %67 %
171Uses JSON-LD url   Other-0.131147 %76 %
172Variations in TITLE Attributes   Relevancy-0.1387535 %79 %
173Exact Matches in Sentences   Relevancy-0.1242218 %82 %
174Has US Phone Number   Trust-0.121140 %72 %
175Has Meta Twitter Description   Authority-0.121130 %58 %
176Variations making whole H1 Tags   Relevancy-0.12118 %79 %
177Variations in H4-H6 Tags   Relevancy-0.1216117 %81 %
178Is Pagination Page   Other-0.121120 %65 %
179Variations in ID Attributes   Relevancy-0.1210213 %82 %
180Uses Schema url   Other-0.121155 %68 %
181Uses JSON-LD ListItem   Other-0.121133 %71 %
182Leading Variations in H3 Tags   Relevancy-0.125116 %78 %
183Percentage of NoFollow Links   Authority-0.1215323 %74 %
184Has Meta Twitter Title   Authority-0.121131 %58 %
185Has Google Verify   Technology-0.121122 %65 %
186Exact Matches in Title Tag   Relevancy-0.122115 %79 %
187Uses JSON-LD ItemList   Other-0.12114 %46 %
188Variations in Button Tags   Relevancy-0.1238210 %82 %
189Number of NoFollow External Links   Authority-0.1221317 %75 %
190Uses Schema itemlist   Other-0.12114 %47 %
191Number of Questions In H2 Tags   Size-0.124123 %74 %
192Has Entities in H4 Tags   Relevancy-0.121122 %79 %
193Uses Schema organization   Other-0.121134 %67 %
194Uses Schema image   Other-0.121122 %71 %
195Is Category Page   Other-0.121115 %67 %
196Variations in H4 Tags   Relevancy-0.125113 %78 %
197Percentage of NoFollow Internal Links   Authority-0.1213214 %71 %
198Variations in Value Attributes   Relevancy-0.1222111 %80 %
199Uses JSON-LD image   Other-0.121116 %69 %
200Uses JSON-LD description   Other-0.121140 %70 %