Measures 154039 SEO Factors

152317 Built-In SEO Factors

143092 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-0.3106323771 %82 %
2Number of Referring Domains   Authority-0.297624033 %94 %
3Number of Backlinks   Authority-0.29147697193333 %93 %
4Number of Do Follow Backlinks   Authority-0.28123617144629 %93 %
5Has Meta Charset   Technology-0.271159 %92 %
6Number of Heading Tags   Size-0.27472059 %92 %
7Number of P Tags   Size-0.271473858 %91 %
8Number of Top 200 Shared Factors Used   Diversity-0.27503584 %92 %
9Number of Images   Size-0.27792358 %92 %
10Number of No Follow Backlinks   Authority-0.263538158722 %91 %
11Number of Images with ALT Text   Size-0.26621654 %90 %
12Number of H1 Tags   Size-0.263155 %93 %
13Clean Text Kilobytes   Size-0.26701258 %94 %
14Number of Top 100 Shared Factors Used   Diversity-0.26382784 %93 %
15Number of H2 Tags   Size-0.2615754 %92 %
16Number of Top 50 Shared Factors Used   Diversity-0.26161183 %90 %
17Word Count   Size-0.257427145174 %93 %
18Unabridged Word Count   Size-0.258335178474 %94 %
19Variations in H1-H6 Tags   Relevancy-0.25304946 %85 %
20Variations in H1, H2, and H3 Tags   Relevancy-0.24254846 %86 %
21Variations in P Tags   Relevancy-0.2450585846 %89 %
22Variations in H1 and H2 Tags   Relevancy-0.2491544 %86 %
23Search Result Domain is .com, .net, or .org   Other-0.24115 %81 %
24Average Words Per Sentence   Size-0.242323064 %91 %
25LSI Words in Sentences   Relevancy-0.23482962853 %95 %
26Has JSON-LD Schema Markup   Relevancy-0.231142 %87 %
27Number of DoFollow Links   Authority-0.2333111468 %93 %
28Number of Links   Authority-0.2333111668 %93 %
29Number of HTTPS Links   Authority-0.2333111567 %93 %
30Number of External Links   Authority-0.23701263 %95 %
31Number of DoFollow External Links   Authority-0.23481162 %94 %
32Search Result Domain is .com   Other-0.23115 %81 %
33Variations in H1 Tags   Relevancy-0.235139 %83 %
34Number of Internal Links   Authority-0.2332010566 %92 %
35Number of H3 Tags   Size-0.2225845 %88 %
36Variations in Search Result Document File Name   Relevancy-0.228136 %89 %
37Number of Unique Variations Used   Diversity-0.22441267 %65 %
38Number of Facebook Pages   Authority-0.229241 %89 %
39Entities in Sentences   Relevancy-0.2258911951 %97 %
40Variations in LI Tags   Relevancy-0.228572946 %87 %
41LSI Words in H2 Tags   Relevancy-0.22841742 %93 %
42Number of HTML Tags   Size-0.22279092874 %92 %
43Number of HTML Comments   Size-0.225995056 %91 %
44Load Time Milliseconds   Performance-0.2229355243174 %88 %
45Leading Variations in H1, H2, and H3 Tags   Relevancy-0.226234 %84 %
46Variation Count in Top 30KB   Relevancy-0.2249734748 %81 %
47Leading Variations in H1-H6 Tags   Relevancy-0.228235 %84 %
48Variations in Div Tags   Relevancy-0.222657331655 %88 %
49Entities in H2 Tags-0.2232738 %96 %
50Number of Images without ALT Text   Size-0.2144842 %93 %
51Variations in Search Result URL Path   Relevancy-0.218137 %87 %
52Entities in the HTML Tag   Relevancy-0.2159212256 %96 %
53Variations in H2 Tags   Relevancy-0.2182436 %84 %
54Number of Factors Used   Diversity-0.2131917584 %88 %
55Number of Includes   Technology-0.21632465 %84 %
56Variations in A Tags   Relevancy-0.2132244646 %83 %
57Entities in H1 Tags-0.216238 %92 %
58Has Entities in H2 Tags   Relevancy-0.211138 %92 %
59Number of Instagram Pages   Authority-0.2112231 %88 %
60Number of LinkedIn Pages   Authority-0.213120 %93 %
61Has Entities in H1 Tags   Relevancy-0.21140 %94 %
62Variations in Search Result URL   Relevancy-0.215243 %82 %
63Search Result Number of Dirs in Path   Other-0.23266 %81 %
64Number of Social Accounts   Authority-0.24229 %88 %
65Number Of JSON-LD Types   Relevancy-0.21481545 %87 %
66Number of Forms   Technology-0.27237 %89 %
67LSI Words in H1 Tags   Relevancy-0.213442 %91 %
68Number of CSS Includes   Technology-0.221958 %79 %
69Variations in Main Tags   Relevancy-0.21164412228 %85 %
70Variations in Body Tags   Relevancy-0.210711679162 %82 %
71Has US Phone Number   Trust-0.21130 %83 %
72Is Home Page   Other-0.21112 %60 %
73Number of Facebook Accounts   Authority-0.22117 %86 %
74Number of Questions In Headings   Size-0.197230 %88 %
75Has Form   Technology-0.191135 %87 %
76Flesch Kincaid Reading Grade Level   Other-0.196281 %85 %
77Variations in Span Tags   Relevancy-0.195171336 %91 %
78Variations in HTML Tags   Relevancy-0.1910711676360 %85 %
79Variations in ALT Attributes   Relevancy-0.19387832 %80 %
80Uses JSON-LD name   Other-0.191144 %84 %
81Number of US Phone Numbers   Trust-0.1911551629 %86 %
82LSI Words in H3 Tags   Relevancy-0.191111935 %91 %
83Variations in Nav Tags   Relevancy-0.1958576534 %80 %
84Uses JSON-LD url   Other-0.191140 %82 %
85Variations in H3 Tags   Relevancy-0.19163427 %80 %
86Entities in H3 Tags-0.1931631 %95 %
87Leading Variations in H1 Tags   Relevancy-0.191122 %83 %
88Search Result URL Length   Size-0.19876383 %55 %
89Search Result Summary Length   Size-0.1915314683 %78 %
90Headings Has Question   Other-0.191130 %85 %
91Number of Social Pages   Authority-0.1821449 %91 %
92Percentage of DoFollow External Links   Authority-0.18281261 %85 %
93Variations in Search Result Link Text   Relevancy-0.189262 %76 %
94Variations in Search Result Display URL   Relevancy-0.189262 %76 %
95Has Privacy Policy   Trust-0.181148 %72 %
96Number of Twitter Accounts   Authority-0.182113 %88 %
97Number of Distinct Entities Used   Diversity-0.18822359 %93 %
98Variations in the Canonical URL   Relevancy-0.1843236 %84 %
99Variations in Sentences   Relevancy-0.1824565454 %86 %
100Term Frequency   Relevancy-0.186360 %81 %
101Variations in A Tag HREF Attributes   Relevancy-0.1812264642 %91 %
102Search Result Domain Length   Size-0.18241773 %78 %
103Search Result Host Length   Size-0.18241773 %78 %
104Uses JSON-LD BreadcrumbList   Other-0.181128 %75 %
105Variations in Distinct A Tag HREF Attributes   Relevancy-0.188352942 %91 %
106Uses JSON-LD ListItem   Other-0.181129 %76 %
107Is Article Page   Other-0.181133 %77 %
108Has Apple Touch Icon   Technology-0.171139 %82 %
109Uses JSON-LD description   Other-0.171133 %79 %
110Variations in Section Tags   Relevancy-0.1713352728 %89 %
111Has Entities in H3 Tags   Relevancy-0.171131 %90 %
112Percentage of DoFollow Links   Authority-0.17998268 %75 %
113Has Contact Page   Trust-0.171152 %62 %
114Variations in the Title Tag   Relevancy-0.1713249 %75 %
115Number of H4 Tags   Size-0.1721325 %88 %
116Uses Schema website   Other-0.171127 %75 %
117Exact Matches in the HTML Tag   Relevancy-0.17152821 %79 %
118Number of Sentences   Size-0.1779014972 %79 %
119Uses Schema organization   Other-0.171126 %81 %
120Number of Questions In H2 Tags   Size-0.164119 %87 %
121Number of Questions In H3 Tags   Size-0.165115 %80 %
122Variations in OpenGraph Title   Relevancy-0.1611243 %66 %
123Number Of Claimed Brands   Other-0.1628219 %85 %
124Leading Variations in H2 Tags   Relevancy-0.163119 %82 %
125Uses JSON-LD datePublished   Other-0.161125 %76 %
126Percentage of DoFollow Internal Links   Authority-0.16877167 %69 %
127Uses JSON-LD Organization   Other-0.161125 %83 %
128Uses Schema webpage   Other-0.161125 %75 %
129Has Meta Robots   Other-0.161120 %83 %
130Variations in First 100 Words   Relevancy-0.16186749 %80 %
131Number of Meta Generator Tags   Technology-0.162126 %72 %
132Variations in Meta Description   Relevancy-0.1641243 %74 %
133Exact Matches in H1-H6 Tags   Relevancy-0.169114 %84 %
134Uses JSON-LD WebSite-0.161125 %78 %
135Variations in Footer Tags   Relevancy-0.1648263528 %84 %
136Inline CSS Kilobytes   Size-0.162746157 %84 %
137Uses Schema datemodified   Other-0.161124 %71 %
138Entities in Title Tag   Relevancy-0.168350 %84 %
139Leading Variations in Title Tag   Relevancy-0.161125 %83 %
140Variations in Absolute URLs   Relevancy-0.164325046 %89 %
141Uses JSON-LD WebPage   Other-0.161124 %78 %
142Uses JSON-LD dateModified   Other-0.161124 %74 %
143Is OpenGraph Type Article   Technology-0.151124 %64 %
144Variations making whole H1-H6 Tags   Relevancy-0.152112 %79 %
145Exact Matches in Top 30KB   Relevancy-0.1511213 %79 %
146Variations in OpenGraph Description   Relevancy-0.1538239 %70 %
147Uses JSON-LD ImageObject-0.151124 %80 %
148Uses Schema searchaction   Other-0.151118 %72 %
149Search Result Uses HTTPS   Other-0.151173 %82 %
150Uses JSON-LD SearchAction   Other-0.151118 %75 %
151Uses JSON-LD mainEntity   Other-0.15111 %14 %
152Uses Schema breadcrumblist   Other-0.151135 %44 %
153Uses Schema listitem   Other-0.151136 %44 %
154Variations in Search Result Summary   Relevancy-0.1543361 %62 %
155Number of Absolute URLs   Authority-0.15105725273 %61 %
156Variations making whole H1, H2, and H3 Tags   Relevancy-0.151111 %81 %
157Uses Schema inlanguage   Other-0.151124 %70 %
158Uses JSON-LD inLanguage   Other-0.151125 %72 %
159Number of JavaScript Includes   Technology-0.15611769 %81 %
160Uses Schema name   Other-0.151150 %58 %
161Has Meta Viewport   Technology-0.151170 %73 %
162Variations in Script Tags   Relevancy-0.159657949 %74 %
163Uses JSON-LD item   Other-0.151119 %70 %
164Clean Keyword Density in the HTML Tag   Relevancy-0.15192552 %63 %
165Uses Schema telephone   Other-0.141115 %72 %
166Variations making whole A Tags   Relevancy-0.1410122 %81 %
167Number of Email Addresses   Trust-0.1426536 %80 %
168Page Size Kilobytes   Size-0.1486429873 %47 %
169Variations in Strong Tags   Relevancy-0.1496319 %85 %
170Uses Schema image   Other-0.141115 %76 %
171Has Google Verify   Technology-0.141114 %78 %
172Has Terms of Service   Trust-0.141132 %60 %
173Number of Questions   Size-0.14641460 %59 %
174Uses JSON-LD image   Other-0.141113 %77 %
175Entities in Meta Description Tag   Relevancy-0.148343 %80 %
176Variation Density in Top 30KB   Relevancy-0.14300547 %68 %
177TF/IDF   Relevancy-0.141142 %80 %
178Is Store Page   Other-0.141136 %66 %
179Has RSS Link   Authority-0.141120 %64 %
180LSI Words in H4 Tags   Relevancy-0.1452519 %88 %
181Variations in Button Tags   Relevancy-0.1424821710 %85 %
182Variations in I Tags   Relevancy-0.14371515 %79 %
183Uses Schema postalcode   Other-0.141114 %73 %
184Number of HREF Lang Tags   Size-0.142929 %81 %
185Has HREF Lang   Technology-0.14119 %78 %
186Uses Schema url   Other-0.141146 %57 %
187Variations in Article Tags   Relevancy-0.1412721616 %79 %
188Number of Nofollow Links   Authority-0.1441217 %82 %
189LSI Words in Meta Description Tag   Relevancy-0.1424947 %83 %
190Has Schema Markup   Relevancy-0.141155 %54 %
191Uses Schema addresslocality   Other-0.141114 %71 %
192Variations Making Whole LI Tags   Relevancy-0.144119 %81 %
193Uses JSON-LD postalCode   Other-0.141113 %75 %
194Uses Schema description   Other-0.141140 %49 %
195Has Email   Trust-0.141136 %73 %
196Uses Schema answer   Other-0.141110 %63 %
197Uses JSON-LD addressRegion   Other-0.141113 %69 %
198Uses JSON-LD telePhone   Other-0.141113 %78 %
199Uses Schema postaladdress   Other-0.141115 %72 %
200Uses Schema question   Other-0.141110 %63 %