Measures 147887 SEO Factors

146165 Built-In SEO Factors

136999 On-page SEO Factors

9166 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 2025-12     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-0.23112432384 %82 %
2Number of Unique Variations Used   Diversity-0.2224780 %88 %
3Number of Distinct Entities Used   Diversity-0.22632978 %94 %
4Number of Top 200 Shared Factors Used   Diversity-0.21534097 %93 %
5Entities in Title Tag   Relevancy-0.217370 %93 %
6Number of Top 100 Shared Factors Used   Diversity-0.21393097 %93 %
7Number of Top 50 Shared Factors Used   Diversity-0.21171396 %93 %
8Search Result Domain is .com, .net, or .org   Other-0.2114 %64 %
9Load Time Milliseconds   Performance-0.223823145885 %89 %
10Variations in Div Tags   Relevancy-0.25222313674 %89 %
11Variations in H1, H2, and H3 Tags   Relevancy-0.19169664 %89 %
12Variations in H1-H6 Tags   Relevancy-0.19189765 %88 %
13Variations in Body Tags   Relevancy-0.1913377231279 %89 %
14Variations in H1 and H2 Tags   Relevancy-0.1978461 %87 %
15Variations in HTML Tags   Relevancy-0.1913377230978 %90 %
16Variations in P Tags   Relevancy-0.1927543268 %91 %
17Search Result Domain is .com   Other-0.19114 %64 %
18Entities in the HTML Tag   Relevancy-0.1988214474 %95 %
19Entities in Sentences   Relevancy-0.1968014071 %94 %
20Variations in Search Result Document File Name   Relevancy-0.199146 %81 %
21Entities in H1 Tags-0.197257 %91 %
22Number of Factors Used   Diversity-0.1930718097 %89 %
23Variations in Sentences   Relevancy-0.18106104172 %90 %
24Term Frequency   Relevancy-0.185378 %90 %
25Variations in LI Tags   Relevancy-0.1828912166 %88 %
26Number of Referring Domains   Authority-0.18297110946 %72 %
27Variations in A Tags   Relevancy-0.1854832465 %84 %
28Entities in H2 Tags-0.1832753 %93 %
29Variations in Search Result Display URL   Relevancy-0.1815277 %83 %
30Variations in the Title Tag   Relevancy-0.1816265 %87 %
31Variations in Search Result Link Text   Relevancy-0.1815277 %82 %
32Variations in Search Result URL Path   Relevancy-0.179147 %85 %
33Leading Variations in H1, H2, and H3 Tags   Relevancy-0.1718244 %86 %
34Variations in H1 Tags   Relevancy-0.1712154 %87 %
35LSI Words in Title Tag   Relevancy-0.1714670 %94 %
36Number of Backlinks   Authority-0.17770312635146 %73 %
37Leading Variations in H1-H6 Tags   Relevancy-0.1720246 %86 %
38LSI Words in Sentences   Relevancy-0.17406874669 %94 %
39Variation Count in Top 30KB   Relevancy-0.1759572767 %87 %
40Number of HTML Tags   Size-0.173505110585 %86 %
41Number of Images   Size-0.172612978 %86 %
42Clean Keyword Density in the HTML Tag   Relevancy-0.17150371 %81 %
43Variations in H2 Tags   Relevancy-0.1768345 %85 %
44Number of Do Follow Backlinks   Authority-0.17715834580741 %72 %
45Variations in Meta Description   Relevancy-0.1743254 %85 %
46Variations in the Canonical URL   Relevancy-0.1748250 %86 %
47Word Count   Size-0.1710320141785 %86 %
48Exact Matches in the HTML Tag   Relevancy-0.173491329 %86 %
49Unabridged Word Count   Size-0.1640907180985 %87 %
50Entities in Meta Description Tag   Relevancy-0.1611359 %89 %
51Number of No Follow Backlinks   Authority-0.165447866335 %68 %
52Clean Text Kilobytes   Size-0.162111277 %86 %
53Variations in First 100 Words   Relevancy-0.16152665 %83 %
54Entities in H3 Tags-0.1627644 %92 %
55TF/IDF   Relevancy-0.161157 %86 %
56Variations in A Tag HREF Attributes   Relevancy-0.1638014259 %87 %
57Number of Images with ALT Text   Size-0.161792073 %87 %
58Variations in Span Tags   Relevancy-0.161081951 %87 %
59Number of Heading Tags   Size-0.16532178 %86 %
60Number of P Tags   Size-0.163113876 %88 %
61Leading Variations in H1 Tags   Relevancy-0.162129 %81 %
62Variations in Search Result URL   Relevancy-0.1622254 %81 %
63LSI Words in H1 Tags   Relevancy-0.1617560 %92 %
64Variations in Distinct A Tag HREF Attributes   Relevancy-0.1621182659 %88 %
65Variations in ALT Attributes   Relevancy-0.16410644 %84 %
66Variation Density in Top 30KB   Relevancy-0.16296261 %82 %
67Has Entities in H1 Tags   Relevancy-0.161158 %87 %
68Number of HTTPS Links   Authority-0.1695915381 %85 %
69Leading Variations in Title Tag   Relevancy-0.161132 %81 %
70Number of Links   Authority-0.1696215581 %84 %
71Number of DoFollow Links   Authority-0.1695615181 %85 %
72Number of Internal Links   Authority-0.1694214181 %85 %
73Variations in Nav Tags   Relevancy-0.15131853447 %84 %
74Percentage of DoFollow Internal Links   Authority-0.15937581 %86 %
75Variations in Absolute URLs   Relevancy-0.1588476461 %88 %
76Variations in OpenGraph Title   Relevancy-0.1511153 %80 %
77Variations in Script Tags   Relevancy-0.154881511862 %86 %
78Variations in Main Tags   Relevancy-0.15254397538 %86 %
79Variations in OpenGraph Description   Relevancy-0.1597248 %80 %
80Percentage of DoFollow Links   Authority-0.151008582 %91 %
81Number of Forms   Technology-0.1514356 %80 %
82Number of H1 Tags   Size-0.155272 %86 %
83Number of H2 Tags   Size-0.1518769 %85 %
84Search Result Number of Dirs in Path   Other-0.154274 %76 %
85Title Tag Has Entities   Relevancy-0.151170 %88 %
86Number of HTML Comments   Size-0.159814674 %85 %
87LSI Words in H2 Tags   Relevancy-0.15862058 %92 %
88Variations in H3 Tags   Relevancy-0.1596333 %83 %
89Number of Includes   Technology-0.15492782 %75 %
90Number of DoFollow External Links   Authority-0.15701376 %84 %
91Number of External Links   Authority-0.15811477 %85 %
92LSI Words in Meta Description Tag   Relevancy-0.15421158 %91 %
93Exact Matches in H1-H6 Tags   Relevancy-0.1511119 %85 %
94Exact Matches in Top 30KB   Relevancy-0.1429218 %78 %
95Number of Sentences   Size-0.14102812883 %84 %
96Has JSON-LD Schema Markup   Relevancy-0.141155 %74 %
97Number of H3 Tags   Size-0.1438860 %83 %
98Flesch Kincaid Reading Grade Level   Other-0.147293 %87 %
99Variations making whole H1-H6 Tags   Relevancy-0.142117 %77 %
100Number of Facebook Pages   Authority-0.149260 %79 %
101Has Entities in H2 Tags   Relevancy-0.141154 %85 %
102Variations in Footer Tags   Relevancy-0.1439751136 %82 %
103Leading Variations in H2 Tags   Relevancy-0.148122 %82 %
104Exact Matches in Sentences   Relevancy-0.1442321 %86 %
105Number of CSS Includes   Technology-0.14201075 %76 %
106Average Words Per Sentence   Size-0.141663080 %80 %
107Number Of JSON-LD Types   Relevancy-0.141461457 %79 %
108Has Privacy Policy   Trust-0.141158 %74 %
109Has Meta Charset   Technology-0.141176 %83 %
110Number of Images without ALT Text   Size-0.141061059 %81 %
111Variations making whole H1, H2, and H3 Tags   Relevancy-0.142116 %78 %
112Variations in Section Tags   Relevancy-0.1415601737 %84 %
113Number of Absolute URLs   Authority-0.13114928784 %80 %
114Search Result Host Length   Size-0.13261785 %78 %
115Variations in TITLE Attributes   Relevancy-0.13345637 %81 %
116Search Result Uses HTTPS   Other-0.131185 %84 %
117Search Result Domain Length   Size-0.13261785 %78 %
118Number of Questions In Headings   Size-0.139237 %81 %
119Exact Matches in Title Tag   Relevancy-0.132117 %84 %
120Has Canonical URL   Authority-0.131172 %79 %
121Has Form   Technology-0.131154 %77 %
122Page Size Kilobytes   Size-0.13120830884 %77 %
123LSI Words in H3 Tags   Relevancy-0.13942050 %90 %
124Has Meta Viewport   Technology-0.131183 %83 %
125Title Length   Size-0.131085184 %79 %
126Variations making whole H1 Tags   Relevancy-0.131110 %77 %
127Variations Making Whole Span Tags   Relevancy-0.134120 %82 %
128Title Word Count   Size-0.1315883 %78 %
129Variations in Strong Tags   Relevancy-0.1395226 %82 %
130Number of Questions   Size-0.131431269 %81 %
131Entities in H4 Tags-0.1310221 %85 %
132Meta Description Tag Has Entities   Relevancy-0.131158 %80 %
133Has Meta Description   Relevancy-0.131166 %78 %
134Number of Instagram Pages   Authority-0.1316248 %77 %
135Inline CSS Kilobytes   Size-0.132276166 %74 %
136Variations making whole A Tags   Relevancy-0.13111228 %74 %
137Variations Making Whole LI Tags   Relevancy-0.136125 %76 %
138Number of Questions In H2 Tags   Size-0.134123 %77 %
139Number of Prices   Size-0.1317937068 %80 %
140Number of JavaScript Includes   Technology-0.13381782 %76 %
141Is Store Page   Other-0.131149 %70 %
142Has Entities in H3 Tags   Relevancy-0.131145 %82 %
143Meta Description Length   Size-0.1366012167 %78 %
144Uses JSON-LD name   Other-0.131154 %72 %
145Has FavIcon   Technology-0.131177 %81 %
146Percentage of DoFollow External Links   Authority-0.13321175 %77 %
147Number of H4 Tags   Size-0.1320437 %79 %
148Word Count in Meta Description   Size-0.12481967 %78 %
149Uses Schema name   Other-0.121162 %69 %
150Has Schema Markup   Relevancy-0.121165 %73 %
151Number of Social Pages   Authority-0.1217465 %79 %
152Headings Has Question   Other-0.121136 %76 %
153Has Contact Page   Trust-0.121163 %72 %
154Is Purchase Page   Other-0.121143 %66 %
155Exact Matches in H1 Tags   Relevancy-0.122113 %84 %
156Number of Social Accounts   Authority-0.1215242 %79 %
157Inline JavaScript Kilobytes   Size-0.1270811081 %75 %
158Uses Schema sku   Other-0.12116 %31 %
159Variations in I Tags   Relevancy-0.12299425 %79 %
160Number of Facebook Accounts   Authority-0.128129 %77 %
161Variations in the last 100 words   Relevancy-0.12195346 %80 %
162Variations in Button Tags   Relevancy-0.12427058 %79 %
163Number of LinkedIn Pages   Authority-0.1214129 %74 %
164Is Home Page   Other-0.121119 %40 %
165Uses Schema image   Other-0.121122 %64 %
166Number of Email Addresses   Trust-0.1274445 %80 %
167Number of Nofollow Links   Authority-0.1223426 %76 %
168Uses JSON-LD description   Other-0.121143 %65 %
169Uses JSON-LD BreadcrumbList   Other-0.121136 %65 %
170Uses Schema itemreviewed   Other-0.12112 %17 %
171Uses JSON-LD ListItem   Other-0.121136 %67 %
172Has OpenGraph Type   Relevancy-0.121162 %72 %
173Number of HREF Lang Tags   Size-0.1244211 %73 %
174Uses JSON-LD sku   Other-0.12115 %34 %
175Uses Schema aggregaterating   Other-0.121110 %59 %
176Variations in Meta Twitter Description   Relevancy-0.1230122 %72 %
177Number of US Phone Numbers   Trust-0.126701237 %78 %
178Variations in Meta Twitter Content   Relevancy-0.124124 %69 %
179Has OpenGraph Image   Relevancy-0.111154 %69 %
180Search Result URL Length   Size-0.111056397 %58 %
181Uses JSON-LD image   Other-0.111117 %70 %
182Variations in Article Tags   Relevancy-0.116171223 %72 %
183Number of Questions In H3 Tags   Size-0.116117 %77 %
184Leading Variations in H3 Tags   Relevancy-0.1110115 %77 %
185Uses JSON-LD url-0.111146 %72 %
186Has Terms of Service   Trust-0.111135 %64 %
187Is Article Page   Other-0.111144 %63 %
188Uses Schema availability   Other-0.11116 %46 %
189Uses Schema url   Other-0.111157 %64 %
190Uses Schema listitem   Other-0.111144 %63 %
191Uses Schema pricecurrency   Other-0.11118 %48 %
192Has US Phone Number   Trust-0.111138 %64 %
193Is OpenGraph Type Article   Technology-0.111135 %55 %
194Uses Schema breadcrumblist   Other-0.111143 %63 %
195Variations in H4-H6 Tags   Relevancy-0.1132116 %76 %
196Has HREF Lang   Technology-0.111113 %68 %
197Has Email   Trust-0.111145 %70 %
198Uses Schema website   Other-0.111138 %55 %
199Has Google Verify   Technology-0.111122 %69 %
200Exact Matches in H2 Tags   Relevancy-0.115111 %84 %