Measures 153921 SEO Factors

152199 Built-In SEO Factors

142979 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-0.2993824265 %76 %
2Number of Top 200 Shared Factors Used   Diversity-0.26523678 %89 %
3Number of Top 100 Shared Factors Used   Diversity-0.26392778 %90 %
4Number of Referring Domains   Authority-0.269845130 %87 %
5Number of Top 50 Shared Factors Used   Diversity-0.25161178 %91 %
6Number of Backlinks   Authority-0.25197596287130 %87 %
7Number of Heading Tags   Size-0.25591954 %86 %
8Number of P Tags   Size-0.252183553 %88 %
9Load Time Milliseconds   Performance-0.2525940214667 %86 %
10Number of Do Follow Backlinks   Authority-0.25188984266528 %86 %
11Entities in Sentences   Relevancy-0.2595414551 %93 %
12Variations in H1-H6 Tags   Relevancy-0.252921043 %82 %
13Word Count   Size-0.2412278137866 %87 %
14Clean Text Kilobytes   Size-0.242841354 %85 %
15Entities in the HTML Tag   Relevancy-0.24105014956 %93 %
16Variations in H1, H2, and H3 Tags   Relevancy-0.24259942 %83 %
17Unabridged Word Count   Size-0.2456122194566 %87 %
18Number of H2 Tags   Size-0.2429648 %86 %
19Entities in H2 Tags-0.2454735 %92 %
20Variations in P Tags   Relevancy-0.2440147042 %87 %
21Number of Images   Size-0.241652454 %87 %
22Variations in H1 and H2 Tags   Relevancy-0.24123541 %83 %
23Has Meta Charset   Technology-0.241154 %81 %
24Number of Unique Variations Used   Diversity-0.24591261 %79 %
25Number of No Follow Backlinks   Authority-0.232628125021 %82 %
26Variations in Div Tags   Relevancy-0.233586450752 %86 %
27Number of Distinct Entities Used   Diversity-0.23682861 %92 %
28Variations in Search Result Document File Name   Relevancy-0.237134 %82 %
29Variations in LI Tags   Relevancy-0.2317434042 %85 %
30Number of Images with ALT Text   Size-0.23851650 %87 %
31Number of HTML Tags   Size-0.23417297767 %88 %
32Variations in A Tags   Relevancy-0.2354227244 %81 %
33Number of DoFollow Links   Authority-0.2341912261 %87 %
34Number of Links   Authority-0.2345212561 %87 %
35Number of H1 Tags   Size-0.2311150 %87 %
36Number of HTTPS Links   Authority-0.2341912460 %87 %
37Number of Factors Used   Diversity-0.2329617078 %85 %
38Variation Count in Top 30KB   Relevancy-0.2354788247 %80 %
39Number of Internal Links   Authority-0.2339011260 %86 %
40Has Entities in H2 Tags   Relevancy-0.221136 %86 %
41Number of External Links   Authority-0.221351456 %88 %
42Has JSON-LD Schema Markup   Relevancy-0.221137 %77 %
43Entities in H1 Tags-0.2217237 %90 %
44Entities in Title Tag   Relevancy-0.2210350 %89 %
45Has Entities in H1 Tags   Relevancy-0.221138 %85 %
46Variations in Body Tags   Relevancy-0.2294781111859 %84 %
47Variations in H1 Tags   Relevancy-0.2211136 %80 %
48Variations in Search Result URL Path   Relevancy-0.228236 %80 %
49Entities in H3 Tags-0.2251829 %93 %
50Number of DoFollow External Links   Authority-0.221341255 %89 %
51Variations in Distinct A Tag HREF Attributes   Relevancy-0.2215294441 %85 %
52Variations in H2 Tags   Relevancy-0.22117431 %81 %
53Average Words Per Sentence   Size-0.222873057 %86 %
54Variations in A Tag HREF Attributes   Relevancy-0.2122546941 %85 %
55Search Result Number of Dirs in Path   Other-0.213261 %80 %
56Number of Images without ALT Text   Size-0.21113940 %85 %
57Variations in HTML Tags   Relevancy-0.2194781108457 %87 %
58Leading Variations in H1-H6 Tags   Relevancy-0.2118231 %81 %
59Leading Variations in H1, H2, and H3 Tags   Relevancy-0.2113229 %81 %
60LSI Words in Sentences   Relevancy-0.21446658246 %92 %
61Number of Facebook Pages   Authority-0.215238 %85 %
62Number of HTML Comments   Size-0.215634852 %84 %
63Number of H3 Tags   Size-0.2137841 %87 %
64Flesch Kincaid Reading Grade Level   Other-0.216172 %87 %
65Number Of JSON-LD Types   Relevancy-0.211511439 %83 %
66Search Result Domain is .com, .net, or .org   Other-0.21117 %80 %
67Search Result Domain is .com   Other-0.21116 %78 %
68Variations in Main Tags   Relevancy-0.212030823126 %83 %
69Variations in Sentences   Relevancy-0.241268251 %87 %
70Variations in Span Tags   Relevancy-0.28341934 %88 %
71Number of Includes   Technology-0.2602562 %82 %
72Variations in ALT Attributes   Relevancy-0.2247831 %78 %
73Term Frequency   Relevancy-0.26357 %84 %
74Variations in Absolute URLs   Relevancy-0.2919612544 %83 %
75Percentage of DoFollow Links   Authority-0.2997960 %80 %
76Number of Forms   Technology-0.215235 %78 %
77Variations in the Canonical URL   Relevancy-0.246236 %83 %
78Variations in Nav Tags   Relevancy-0.21181610432 %84 %
79Number of Social Pages   Authority-0.223545 %85 %
80Variations in H3 Tags   Relevancy-0.19195524 %82 %
81Clean Keyword Density in the HTML Tag   Relevancy-0.19195751 %71 %
82LSI Words in H2 Tags   Relevancy-0.191931636 %90 %
83Number of Sentences   Size-0.1989313864 %83 %
84Variations in First 100 Words   Relevancy-0.19172948 %82 %
85Has Form   Technology-0.191134 %76 %
86Number of Questions In Headings   Size-0.198224 %81 %
87Uses JSON-LD name   Other-0.191137 %77 %
88Has Entities in H3 Tags   Relevancy-0.191130 %86 %
89Variations in Search Result URL   Relevancy-0.1923243 %76 %
90Number of Instagram Pages   Authority-0.1921330 %82 %
91Number of LinkedIn Pages   Authority-0.194120 %80 %
92Number of CSS Includes   Technology-0.1925954 %74 %
93Percentage of DoFollow External Links   Authority-0.19321254 %81 %
94Search Result Uses HTTPS   Other-0.191165 %72 %
95Entities in Meta Description Tag   Relevancy-0.1914342 %84 %
96Number of Facebook Accounts   Authority-0.193118 %79 %
97Search Result Domain Length   Size-0.19231666 %77 %
98Number of Social Accounts   Authority-0.196227 %84 %
99Search Result Host Length   Size-0.19231666 %77 %
100Percentage of DoFollow Internal Links   Authority-0.19926859 %76 %
101Variations in Footer Tags   Relevancy-0.1948965326 %79 %
102Has Apple Touch Icon   Technology-0.181133 %73 %
103Has Meta Viewport   Technology-0.181162 %76 %
104Variations in Section Tags   Relevancy-0.1816063525 %87 %
105LSI Words in H1 Tags   Relevancy-0.1833437 %89 %
106Headings Has Question   Other-0.181125 %79 %
107Is Article Page   Other-0.181129 %71 %
108Inline CSS Kilobytes   Size-0.182245951 %82 %
109Number of JavaScript Includes   Technology-0.18481862 %83 %
110Page Size Kilobytes   Size-0.1899432264 %65 %
111Variation Density in Top 30KB   Relevancy-0.18328646 %73 %
112Title Tag Has Entities   Relevancy-0.181149 %78 %
113Variations in Meta Description   Relevancy-0.1839240 %75 %
114Has Canonical URL   Authority-0.181154 %67 %
115Variations in OpenGraph Description   Relevancy-0.1843236 %73 %
116Uses JSON-LD url   Other-0.181133 %74 %
117Variations in the Title Tag   Relevancy-0.1812247 %77 %
118Has Privacy Policy   Trust-0.181142 %71 %
119Uses Schema organization   Other-0.181124 %73 %
120Leading Variations in H1 Tags   Relevancy-0.171117 %76 %
121Variations in OpenGraph Title   Relevancy-0.1710240 %72 %
122Variations in Script Tags   Relevancy-0.172198625148 %81 %
123Uses JSON-LD description   Other-0.171129 %73 %
124TF/IDF   Relevancy-0.171141 %81 %
125Number of Absolute URLs   Authority-0.17194825865 %72 %
126Variations making whole A Tags   Relevancy-0.1725221 %79 %
127Has FavIcon   Technology-0.171155 %70 %
128Variations Making Whole LI Tags   Relevancy-0.177118 %78 %
129LSI Words in H3 Tags   Relevancy-0.171701930 %90 %
130Uses JSON-LD ListItem   Other-0.171124 %74 %
131Uses JSON-LD Organization   Other-0.171123 %74 %
132Variations Making Whole Span Tags   Relevancy-0.176114 %81 %
133Number of H4 Tags   Size-0.1731324 %82 %
134Uses JSON-LD BreadcrumbList   Other-0.171123 %74 %
135Has Contact Page   Trust-0.171146 %68 %
136Variations in Search Result Display URL   Relevancy-0.1714261 %72 %
137Variations in Search Result Link Text   Relevancy-0.1714261 %72 %
138Number of US Phone Numbers   Trust-0.17212929 %84 %
139Word Count in Meta Description   Size-0.17571849 %71 %
140Search Result URL Length   Size-0.17966578 %60 %
141Inline JavaScript Kilobytes   Size-0.1756113362 %64 %
142Number of Questions   Size-0.16641349 %74 %
143Has US Phone Number   Trust-0.161128 %77 %
144Has Meta Description   Relevancy-0.161148 %64 %
145Meta Description Length   Size-0.1633411249 %71 %
146LSI Words in Title Tag   Relevancy-0.1624547 %83 %
147Number of Questions In H2 Tags   Size-0.164116 %80 %
148Search Result Summary Length   Size-0.1616114876 %75 %
149Is Store Page   Other-0.161134 %66 %
150Has Schema Markup   Relevancy-0.161147 %63 %
151Uses Schema datemodified   Other-0.161121 %69 %
152Uses JSON-LD datePublished   Other-0.161122 %70 %
153Leading Variations in Title Tag   Relevancy-0.161121 %76 %
154Uses Schema name   Other-0.161143 %63 %
155Uses JSON-LD dateModified   Other-0.161120 %71 %
156Has Meta Robots   Other-0.161118 %69 %
157Number of Twitter Accounts   Authority-0.162114 %77 %
158Title Word Count   Size-0.1628865 %69 %
159Variations in Strong Tags   Relevancy-0.16129317 %84 %
160LSI Words in Meta Description Tag   Relevancy-0.1623839 %86 %
161Variations in Article Tags   Relevancy-0.1647262816 %76 %
162Leading Variations in H2 Tags   Relevancy-0.166116 %79 %
163Number of Prices   Size-0.16373813053 %79 %
164Variations making whole H1, H2, and H3 Tags   Relevancy-0.161110 %77 %
165Is OpenGraph Type Article   Technology-0.161121 %66 %
166Has OpenGraph Type   Relevancy-0.161146 %64 %
167Meta Description Tag Has Entities   Relevancy-0.161141 %72 %
168Uses Schema webpage   Other-0.161122 %71 %
169Title Length   Size-0.161705365 %70 %
170Has Google Verify   Technology-0.161113 %71 %
171Number of Questions In H3 Tags   Size-0.165213 %80 %
172Variations making whole H1-H6 Tags   Relevancy-0.162111 %78 %
173Uses JSON-LD ImageObject   Other-0.161122 %73 %
174Variations in the last 100 words   Relevancy-0.16179638 %74 %
175Uses JSON-LD WebPage   Other-0.151121 %72 %
176Has Terms of Service   Trust-0.151131 %64 %
177Has OpenGraph Image   Relevancy-0.151142 %65 %
178Variations in Search Result Summary   Relevancy-0.1548362 %66 %
179Entities in H4 Tags-0.1511213 %88 %
180Variations in Button Tags   Relevancy-0.1533122811 %80 %
181Number of Email Addresses   Trust-0.1540431 %79 %
182Uses Schema product   Other-0.15117 %47 %
183Variations in Class Attributes   Relevancy-0.15970410618 %80 %
184Uses Schema url   Other-0.151140 %60 %
185Is Purchase Page   Other-0.151136 %55 %
186Uses JSON-LD item-0.151117 %71 %
187Number of Nofollow Links   Authority-0.1591417 %74 %
188Uses JSON-LD Product   Other-0.15117 %47 %
189Uses Schema website   Other-0.151122 %64 %
190Number Of Claimed Brands   Other-0.1572216 %73 %
191Uses Schema description   Other-0.151134 %58 %
192Has Meta Twitter Card   Authority-0.151141 %62 %
193Has Copyright   Trust-0.151145 %59 %
194Has DocType Tag   Technology-0.151157 %56 %
195Uses Schema datepublished   Other-0.151126 %54 %
196Leading Variations in H3 Tags   Relevancy-0.147112 %78 %
197Uses JSON-LD inLanguage   Other-0.141120 %65 %
198Uses Schema inlanguage   Other-0.141120 %65 %
199Exact Matches in the HTML Tag   Relevancy-0.143721220 %86 %
200Uses JSON-LD WebSite   Other-0.141120 %67 %