200 Top SEO Ranking Factors April 2021

TOP SEO Factors for 2021-4 previous - today - next

Top SEO Factor data is updated daily for latest "month to date" measurements.

	Name	Correlation	#1 Max	Page 1 Avg	Usage %	Searches %
1	Number of Distinct Entities Used Diversity	-0.31	57	30	88 %	54 %
2	Variations in HTML Tags Relevancy	-0.26	26063	265	90 %	94 %
3	Number of Factors Used Diversity	-0.25	197	137	97 %	89 %
4	Term Frequency Relevancy	-0.24	10	6	90 %	93 %
5	Variations in Div Tags Relevancy	-0.24	18189	170	89 %	93 %
6	Variations in A Tags Relevancy	-0.24	2940	39	84 %	96 %
7	Variations in Body Tags Relevancy	-0.23	22251	200	81 %	94 %
8	Variations in A Tag HREF Attributes Relevancy	-0.23	2452	67	80 %	94 %
9	Search Result Has Publish Date	-0.23	1	1	66 %	21 %
10	Variations in H1-H6 Tags Relevancy	-0.23	228	10	83 %	92 %
11	Variations in P Tags Relevancy	-0.23	1972	44	81 %	91 %
12	Variations in H1, H2, and H3 Tags Relevancy	-0.22	128	8	82 %	91 %
13	LSI Words in Sentences Relevancy	-0.22	3258	647	82 %	90 %
14	Variations in LI Tags Relevancy	-0.21	957	23	76 %	94 %
15	Entities in H2 Tags	-0.21	25	7	56 %	53 %
16	Variations in Sentences Relevancy	-0.21	1677	29	81 %	90 %
17	Page Size Kilobytes Size	-0.2	310	139	95 %	88 %
18	Variations in H1 and H2 Tags Relevancy	-0.2	75	5	80 %	89 %
19	DomDetailer Majestic Referring Subnets Authority	-0.2	48857	7463	77 %	23 %
20	Unabridged Word Count Size	-0.2	6183	1862	94 %	93 %
21	Entities in Title Tag Relevancy	-0.2	8	3	80 %	53 %
22	Number of HTML Tags Size	-0.2	2224	885	95 %	88 %
23	Leading Variations in H1-H6 Tags Relevancy	-0.2	24	3	57 %	87 %
24	Clean Text Kilobytes Size	-0.2	33	12	91 %	91 %
25	DomDetailer Majestic Referring Domains Authority	-0.2	1844759	185482	77 %	24 %
26	DomDetailer Majestic IPs Authority	-0.2	235210	28795	77 %	23 %
27	Variations in Script Tags Relevancy	-0.2	4484	51	68 %	93 %
28	Ahrefs Rank Authority	-0.2	45	14	72 %	20 %
29	Ahrefs Referring Class C Addresses Authority	-0.2	622	32	52 %	22 %
30	DomDetailer Majestic CF Authority	-0.2	53	28	76 %	23 %
31	Ahrefs Referring IP Addresses Authority	-0.2	821	39	52 %	22 %
32	Number of HTTPS Links Authority	-0.19	458	156	91 %	88 %
33	Ahrefs Referring Domains Authority	-0.19	979	41	52 %	22 %
34	Clean Keyword Density in the HTML Tag Relevancy	-0.19	184	6	90 %	22 %
35	Variations in ALT Attributes Relevancy	-0.19	170	10	59 %	90 %
36	Word Count Size	-0.19	4440	1445	94 %	92 %
37	Variations in Absolute URLs Relevancy	-0.19	2940	64	73 %	92 %
38	Entities in H3 Tags	-0.19	20	6	45 %	52 %
39	Leading Variations in H1, H2, and H3 Tags Relevancy	-0.19	16	2	53 %	88 %
40	Number of Links Authority	-0.19	459	161	92 %	88 %
41	Variations in H2 Tags Relevancy	-0.19	61	4	54 %	90 %
42	Body Tag Size Kilobytes Size	-0.19	223	80	81 %	91 %
43	Ahrefs NoFollow Backlinks Authority	-0.19	24924	323	46 %	23 %
44	DomDetailer Majestic Links Authority	-0.19	64770911	-3566675	75 %	22 %
45	Number of Internal Links Authority	-0.19	436	144	91 %	88 %
46	Number of DoFollow Links Authority	-0.19	448	155	92 %	87 %
47	Ahrefs Backlinks Authority	-0.19	50578	2389	52 %	22 %
48	Ahrefs Referring Pages Authority	-0.19	50578	2389	52 %	22 %
49	Number of Sentences Size	-0.18	156	46	91 %	87 %
50	Variations in Search Result Display URL Relevancy	-0.18	15	2	91 %	76 %
51	DomDetailer Moz PA Authority	-0.18	59	33	79 %	23 %
52	Ahrefs Text Backlinks Authority	-0.18	50570	2367	52 %	22 %
53	Variations in Search Result Link Text Relevancy	-0.18	15	2	90 %	76 %
54	Keywords in pages top 10 most used phrases	-0.18	19	2	74 %	86 %
55	Number of P Tags Size	-0.18	175	39	90 %	87 %
56	Number of Absolute URLs Authority	-0.18	538	152	93 %	88 %
57	Variations in Nav Tags Relevancy	-0.18	6496	36	51 %	88 %
58	Variations in the Canonical URL Relevancy	-0.18	12	2	59 %	79 %
59	Exact Matches in the HTML Tag Relevancy	-0.17	163	9	39 %	90 %
60	Keywords in pages top 5 most used phrases	-0.17	10	2	64 %	85 %
61	DomDetailer Facebook Shares Authority	-0.17	2737029	-3904427	72 %	23 %
62	Entities in H1 Tags	-0.17	7	3	64 %	47 %
63	Variations in Span Tags Relevancy	-0.17	502	13	63 %	89 %
64	Exact Matches in Body Tag Relevancy	-0.17	124	13	39 %	94 %
65	Variations in the Title Tag Relevancy	-0.17	15	2	84 %	74 %
66	LSI Words in Title Tag Relevancy	-0.17	21	7	80 %	85 %
67	Variations in Search Result URL Path Relevancy	-0.17	7	2	68 %	77 %
68	Variations in Search Result URL Relevancy	-0.17	16	2	70 %	81 %
69	Number of Images with ALT Text Size	-0.17	176	19	84 %	86 %
70	Variations in First 100 Words Relevancy	-0.17	185	8	75 %	79 %
71	Entities in Sentences Relevancy	-0.17	389	92	55 %	92 %
72	Variations in H3 Tags Relevancy	-0.17	93	4	40 %	89 %
73	Number of Images Size	-0.17	211	29	90 %	84 %
74	Number of Heading Tags Size	-0.17	58	22	91 %	87 %
75	DomDetailer Moz DA Authority	-0.17	66	32	78 %	23 %
76	Entities in Meta Description Tag Relevancy	-0.17	9	4	64 %	52 %
77	DomDetailer Moz Links Authority	-0.17	85975868	9394963	76 %	22 %
78	Keywords in pages top 3 most used phrases	-0.17	6	1	55 %	82 %
79	DomDetailer Majestic TF Authority	-0.17	47	21	73 %	23 %
80	Number of Questions Size	-0.16	23	5	66 %	87 %
81	DomDetailer Moz Rank Authority	-0.16	7	4	76 %	22 %
82	Search Result Publish Date	-0.16	2007879419	1721962073	84 %	50 %
83	Has Entities in H2 Tags Relevancy	-0.16	1	1	57 %	48 %
84	TF/IDF Relevancy	-0.16	1	1	76 %	79 %
85	Entities in the HTML Tag Relevancy	-0.16	1651	316	55 %	90 %
86	Leading Variations in H2 Tags Relevancy	-0.16	8	1	27 %	83 %
87	LSI Words in H2 Tags Relevancy	-0.16	75	18	62 %	87 %
88	Ahrefs Has NoFollow Backlinks Authority	-0.16	1	1	45 %	22 %
89	Variations in H1 Tags Relevancy	-0.16	14	2	71 %	76 %
90	Ahrefs Dofollow Backlinks Authority	-0.16	49455	2054	43 %	22 %
91	Variations Making Whole Span Tags Relevancy	-0.16	6	1	22 %	83 %
92	Number of Questions In Headings Size	-0.16	6	2	37 %	78 %
93	Number of H2 Tags Size	-0.16	14	7	75 %	85 %
94	Title Tag Has Entities Relevancy	-0.15	1	1	78 %	41 %
95	Variations in Meta Description Relevancy	-0.15	36	2	65 %	86 %
96	Number of External Links Authority	-0.15	64	18	86 %	83 %
97	Number of H3 Tags Size	-0.15	29	8	69 %	85 %
98	Exact Matches in H1-H6 Tags Relevancy	-0.15	11	2	30 %	87 %
99	Variations in the last 100 words Relevancy	-0.15	183	5	64 %	82 %
100	Load Time Milliseconds Performance	-0.15	119573	2889	95 %	70 %
101	Variations making whole A Tags Relevancy	-0.15	8	2	36 %	86 %
102	Search Result Uses HTTPS Other	-0.15	1	1	90 %	72 %
103	Ahrefs Has Backlinks Authority	-0.15	1	1	51 %	22 %
104	Ahrefs Domain Rating Authority	-0.15	76	39	71 %	24 %
105	Variations in TITLE Attributes Relevancy	-0.15	489	12	43 %	88 %
106	Variations in Main Tags Relevancy	-0.15	5926	70	32 %	86 %
107	DomDetailer Majestic GOV Backlinks Authority	-0.15	23144675	1861693	38 %	22 %
108	LSI Words in H3 Tags Relevancy	-0.15	160	20	56 %	85 %
109	Search Result Number of Dirs in Path Other	-0.15	4	2	81 %	68 %
110	Ahrefs Has Text Backlinks Authority	-0.15	1	1	51 %	22 %
111	Variations in OpenGraph Title Relevancy	-0.15	10	2	61 %	74 %
112	Leading Variations in H1 Tags Relevancy	-0.15	2	1	35 %	80 %
113	Variations in Search Result Document File Name Relevancy	-0.15	6	2	65 %	72 %
114	Leading Variations in Title Tag Relevancy	-0.15	1	1	39 %	77 %
115	Variations Making Whole LI Tags Relevancy	-0.15	5	1	29 %	80 %
116	Variations in ID Attributes Relevancy	-0.15	403	2	15 %	86 %
117	Has Entities in H1 Tags Relevancy	-0.14	1	1	66 %	45 %
118	Entities in H4 Tags	-0.14	11	3	27 %	52 %
119	Inline JavaScript Kilobytes Size	-0.14	96	28	89 %	85 %
120	LSI Words in H1 Tags Relevancy	-0.14	29	6	69 %	78 %
121	Number of DoFollow External Links Authority	-0.14	43	15	83 %	80 %
122	Variations in Section Tags Relevancy	-0.14	1107	22	40 %	85 %
123	Number of Nofollow Links Authority	-0.14	55	7	36 %	83 %
124	Meta Description Tag Has Entities Relevancy	-0.14	1	1	64 %	44 %
125	LSI Words in Meta Description Tag Relevancy	-0.14	50	11	63 %	85 %
126	Variations in Footer Tags Relevancy	-0.14	1796	12	40 %	85 %
127	Number of US Phone Numbers Trust	-0.14	79	8	44 %	77 %
128	Variations in Strong Tags Relevancy	-0.14	107	4	38 %	85 %
129	Percentage of DoFollow Internal Links Authority	-0.14	94	81	90 %	69 %
130	Variations in OpenGraph Description Relevancy	-0.14	30	2	54 %	80 %
131	Exact Matches in A Tags Relevancy	-0.14	30	3	25 %	87 %
132	Has Privacy Policy Trust	-0.14	1	1	57 %	77 %
133	Headings Has Question Other	-0.14	1	1	36 %	77 %
134	Ahrefs Has Dofollow Backlinks Authority	-0.14	1	1	42 %	21 %
135	Number of Questions In H2 Tags Size	-0.13	3	1	20 %	78 %
136	Head Size Kilobytes Size	-0.13	95	33	86 %	82 %
137	Number of NoFollow External Links Authority	-0.13	27	3	25 %	82 %
138	Has Entities in H3 Tags Relevancy	-0.13	1	1	47 %	44 %
139	Has Canonical URL Authority	-0.13	1	1	77 %	73 %
140	Leading Variations in H3 Tags Relevancy	-0.13	9	1	19 %	82 %
141	Variations in Class Attributes Relevancy	-0.13	6326	17	28 %	82 %
142	Exact Matches in Title Tag Relevancy	-0.13	2	1	28 %	80 %
143	Inline CSS Kilobytes Size	-0.13	79	22	59 %	82 %
144	Title Has Sentiment Words Other	-0.13	1	1	16 %	71 %
145	Variations in Article Tags Relevancy	-0.13	1140	26	33 %	76 %
146	Title Has Sales Words Other	-0.13	1	1	15 %	70 %
147	Flesch Kincaid Reading Grade Level Other	-0.13	7	3	90 %	66 %
148	Number of Questions In H3 Tags Size	-0.13	3	1	15 %	79 %
149	Search Result Link Text Length Size	-0.13	81	55	97 %	67 %
150	Variations in I Tags Relevancy	-0.13	111	3	25 %	81 %
151	Variations making whole H1-H6 Tags Relevancy	-0.13	3	1	17 %	79 %
152	Exact Matches in Sentences Relevancy	-0.13	28	2	23 %	88 %
153	Has FavIcon Technology	-0.13	1	1	78 %	68 %
154	Variations in H4-H6 Tags Relevancy	-0.12	87	2	26 %	82 %
155	Percentage of DoFollow Links Authority	-0.12	100	93	91 %	67 %
156	Ahrefs Word Count Size	-0.12	3589	1152	52 %	20 %
157	Variations in Search Result Summary Relevancy	-0.12	5	3	81 %	75 %
158	Variations in H4 Tags Relevancy	-0.12	43	2	20 %	81 %
159	Number of HREF Lang Tags Size	-0.12	10	2	10 %	77 %
160	Variations making whole H1, H2, and H3 Tags Relevancy	-0.12	2	1	15 %	77 %
161	Title Word Count Size	-0.12	15	9	93 %	64 %
162	Has Meta Description Relevancy	-0.12	1	1	73 %	74 %
163	Number of Images without ALT Text Size	-0.12	36	10	68 %	73 %
164	Word Count in Meta Description Size	-0.12	67	22	72 %	75 %
165	Has JSON-LD Question	-0.12	1	1	3 %	58 %
166	Has JSON-LD Answer	-0.12	1	1	3 %	58 %
167	Number of Instagram Pages Authority	-0.12	8	1	37 %	70 %
168	Has US Phone Number Trust	-0.12	1	1	46 %	62 %
169	Keywords in pages most used phrase	-0.12	2	1	27 %	79 %
170	Percentage of NoFollow External Links Authority	-0.12	20	2	23 %	76 %
171	Meta Description Length Size	-0.12	396	131	72 %	75 %
172	Exact Matches in H2 Tags Relevancy	-0.12	5	1	14 %	88 %
173	Percentage of NoFollow Links Authority	-0.12	23	4	34 %	79 %
174	Has Copyright Trust	-0.12	1	1	74 %	68 %
175	Variations in Form Tags Relevancy	-0.12	45	1	15 %	76 %
176	Number of H4 Tags Size	-0.12	20	5	47 %	79 %
177	Has OpenGraph Type Relevancy	-0.12	1	1	64 %	64 %
178	Leading Variations in H4-H6 Tags Relevancy	-0.12	10	1	13 %	76 %
179	Ahrefs Internal Links Authority	-0.12	378	92	57 %	23 %
180	Title Length Size	-0.11	89	58	93 %	60 %
181	Has JSON-LD Website	-0.11	1	1	36 %	64 %
182	Search Result URL Length Size	-0.11	98	62	97 %	51 %
183	Variations in Search Result URL Domain Name Relevancy	-0.11	6	1	5 %	49 %
184	Has Form Technology	-0.11	1	1	70 %	66 %
185	Has DocType Tag Technology	-0.11	1	1	85 %	66 %
186	Has Terms of Service Trust	-0.11	1	1	38 %	74 %
187	Number of Social Accounts Authority	-0.11	4	2	51 %	76 %
188	Exact Matches in H1 Tags Relevancy	-0.11	2	1	21 %	79 %
189	Has Apple Touch Icon Technology	-0.11	1	1	45 %	66 %
190	Number of Forms Technology	-0.11	13	3	71 %	74 %
191	Search Result Link Text Has Year Other	-0.11	1	1	7 %	70 %
192	Has JSON-LD AggregateRating	-0.11	1	1	5 %	56 %
193	Number of Facebook Accounts Authority	-0.11	2	1	34 %	75 %
194	Number of Twitter Accounts Authority	-0.11	3	1	43 %	74 %
195	Variations in Value Attributes Relevancy	-0.11	131	2	14 %	79 %
196	Average Words Per Sentence Size	-0.11	324	44	92 %	73 %
197	Number of HTML Comments Size	-0.11	143	28	76 %	71 %
198	Variations in Button Tags Relevancy	-0.11	187	2	6 %	76 %
199	Ahrefs Page Size Size	-0.11	83145	22817	53 %	19 %
200	Leading Variations in Meta Description Relevancy	-0.11	1	1	12 %	71 %

Measures 143171 SEO Factors

141449 Built-In SEO Factors

132381 On-page SEO Factors

9068 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.

1575 Technology Stack SEO Factors

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TOP SEO Factors for 2021-4 previous - today - next