200 Top SEO Ranking Factors January 2021

TOP SEO Factors for 2021-1 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	-0.29	61	28	91 %	54 %
2	Number of Factors Used Diversity	-0.25	201	133	95 %	81 %
3	Variations in HTML Tags Relevancy	-0.25	860	150	88 %	84 %
4	Term Frequency Relevancy	-0.24	8	5	88 %	83 %
5	Ahrefs Referring Class C Addresses Authority	-0.24	838	41	55 %	30 %
6	Ahrefs Referring Domains Authority	-0.24	1976	65	55 %	30 %
7	Ahrefs Referring IP Addresses Authority	-0.24	1371	53	54 %	30 %
8	Variations in Search Result Display URL Relevancy	-0.24	4	2	83 %	69 %
9	Variations in Search Result Link Text Relevancy	-0.24	4	2	83 %	69 %
10	Variations in H1-H6 Tags Relevancy	-0.23	39	8	78 %	82 %
11	Variations in Div Tags Relevancy	-0.23	642	109	86 %	83 %
12	Ahrefs NoFollow Backlinks Authority	-0.23	33713	296	48 %	30 %
13	Variations in Body Tags Relevancy	-0.23	466	134	81 %	84 %
14	Ahrefs Text Backlinks Authority	-0.22	334937	3889	55 %	30 %
15	Variations in A Tags Relevancy	-0.22	177	28	78 %	84 %
16	Variations in A Tag HREF Attributes Relevancy	-0.22	381	40	71 %	83 %
17	Variations in the Title Tag Relevancy	-0.22	4	2	78 %	69 %
18	Variations in H1, H2, and H3 Tags Relevancy	-0.22	35	7	77 %	83 %
19	Ahrefs Backlinks Authority	-0.22	336018	3905	56 %	30 %
20	Ahrefs Referring Pages Authority	-0.22	336017	3905	56 %	30 %
21	Entities in Title Tag Relevancy	-0.22	7	3	79 %	44 %
22	Variations in P Tags Relevancy	-0.22	144	33	77 %	83 %
23	Variations in H1 and H2 Tags Relevancy	-0.21	13	4	73 %	80 %
24	Entities in H2 Tags	-0.21	30	6	54 %	44 %
25	Keywords in pages top 10 most used phrases	-0.21	6	2	65 %	76 %
26	Variations in Script Tags Relevancy	-0.21	193	28	63 %	91 %
27	Ahrefs Domain Rating Authority	-0.21	82	44	80 %	26 %
28	Variations in Search Result URL Relevancy	-0.2	5	2	59 %	74 %
29	Variations in Search Result URL Path Relevancy	-0.2	5	2	59 %	68 %
30	Exact Matches in Body Tag Relevancy	-0.2	462	13	33 %	93 %
31	Ahrefs Dofollow Backlinks Authority	-0.2	301224	3705	45 %	29 %
32	Ahrefs Rank Authority	-0.2	37	15	79 %	19 %
33	Leading Variations in H1-H6 Tags Relevancy	-0.2	18	2	50 %	80 %
34	Variations in LI Tags Relevancy	-0.2	87	19	70 %	83 %
35	Entities in H3 Tags	-0.2	29	6	45 %	44 %
36	Exact Matches in the HTML Tag Relevancy	-0.2	462	10	34 %	93 %
37	Variations in Search Result Document File Name Relevancy	-0.19	5	2	58 %	63 %
38	Variations in Absolute URLs Relevancy	-0.19	276	42	65 %	90 %
39	Variations in Meta Description Relevancy	-0.19	6	2	58 %	74 %
40	Variations in First 100 Words Relevancy	-0.19	32	7	68 %	72 %
41	Leading Variations in H1, H2, and H3 Tags Relevancy	-0.19	14	2	47 %	80 %
42	Variations in H1 Tags Relevancy	-0.19	6	2	64 %	72 %
43	Keywords in pages top 5 most used phrases	-0.19	4	1	54 %	77 %
44	Variations in the Canonical URL Relevancy	-0.19	5	2	48 %	72 %
45	Ahrefs Has NoFollow Backlinks Authority	-0.19	1	1	46 %	30 %
46	Variations in ALT Attributes Relevancy	-0.19	61	9	52 %	82 %
47	Variations in Sentences Relevancy	-0.18	84	19	74 %	80 %
48	Page Size Kilobytes Size	-0.18	297	133	94 %	78 %
49	Clean Text Kilobytes Size	-0.18	50	12	91 %	75 %
50	Unabridged Word Count Size	-0.18	9864	1979	94 %	86 %
51	Number of HTML Tags Size	-0.18	2579	820	95 %	76 %
52	Entities in H1 Tags	-0.18	6	2	65 %	41 %
53	Variations in OpenGraph Description Relevancy	-0.18	14	2	48 %	71 %
54	Variations in Span Tags Relevancy	-0.18	105	11	58 %	79 %
55	Variations in OpenGraph Title Relevancy	-0.18	8	2	55 %	68 %
56	Ahrefs Has Dofollow Backlinks Authority	-0.18	1	1	44 %	27 %
57	Variations in H2 Tags Relevancy	-0.18	12	3	46 %	82 %
58	Entities in Meta Description Tag Relevancy	-0.17	9	4	63 %	41 %
59	DomDetailer Majestic IPs Authority	-0.17	222365	41969	77 %	22 %
60	Ahrefs Has Text Backlinks Authority	-0.17	1	1	54 %	29 %
61	Body Tag Size Kilobytes Size	-0.17	199	77	82 %	79 %
62	DomDetailer Majestic Referring Subnets Authority	-0.17	44246	10713	77 %	22 %
63	Exact Matches in H1-H6 Tags Relevancy	-0.17	15	2	26 %	91 %
64	DomDetailer Majestic Referring Domains Authority	-0.17	1455487	259275	78 %	22 %
65	Number of HTTPS Links Authority	-0.17	547	136	88 %	72 %
66	Search Result Publish Date	-0.17	2007232500	1831007671	87 %	42 %
67	Word Count Size	-0.17	3717	1454	94 %	75 %
68	Ahrefs Has Backlinks Authority	-0.17	1	1	55 %	28 %
69	Keywords in pages top 3 most used phrases	-0.17	2	1	44 %	77 %
70	Number of Links Authority	-0.17	551	145	91 %	70 %
71	DomDetailer Moz PA Authority	-0.17	65	35	80 %	22 %
72	Search Result Uses HTTPS Other	-0.17	1	1	85 %	68 %
73	TF/IDF Relevancy	-0.17	1	1	67 %	71 %
74	Number of Images Size	-0.17	87	28	89 %	70 %
75	Number of DoFollow Links Authority	-0.17	538	139	91 %	69 %
76	Number of Internal Links Authority	-0.17	527	128	90 %	72 %
77	Title Tag Has Entities Relevancy	-0.17	1	1	80 %	34 %
78	DomDetailer Moz DA Authority	-0.16	79	34	79 %	21 %
79	Inline JavaScript Kilobytes Size	-0.16	120	30	87 %	77 %
80	DomDetailer Majestic Links Authority	-0.16	176047746	17439050	77 %	22 %
81	Variations in Main Tags Relevancy	-0.16	223	44	30 %	76 %
82	Exact Matches in Title Tag Relevancy	-0.16	2	1	22 %	84 %
83	DomDetailer Majestic CF Authority	-0.16	57	29	77 %	22 %
84	Number of Images with ALT Text Size	-0.16	62	18	82 %	73 %
85	Number of P Tags Size	-0.16	146	38	88 %	77 %
86	Has Entities in H1 Tags Relevancy	-0.16	1	1	66 %	37 %
87	LSI Words in Sentences Relevancy	-0.16	3834	521	65 %	82 %
88	Variations in Nav Tags Relevancy	-0.16	219	15	43 %	79 %
89	Leading Variations in Title Tag Relevancy	-0.16	1	1	34 %	69 %
90	Number of JavaScript Includes Technology	-0.16	25	14	86 %	56 %
91	DomDetailer Majestic TF Authority	-0.16	57	23	68 %	21 %
92	Number of Absolute URLs Authority	-0.16	441	134	92 %	74 %
93	Exact Matches in A Tags Relevancy	-0.16	54	3	22 %	91 %
94	Number of Heading Tags Size	-0.16	50	20	91 %	75 %
95	Variations in the last 100 words Relevancy	-0.16	22	4	55 %	72 %
96	Entities in H4 Tags	-0.16	14	3	25 %	41 %
97	Variations in H3 Tags Relevancy	-0.16	25	3	36 %	80 %
98	Leading Variations in H1 Tags Relevancy	-0.16	3	1	31 %	71 %
99	Variations in Strong Tags Relevancy	-0.15	29	4	35 %	75 %
100	Number of Sentences Size	-0.15	113	42	90 %	72 %
101	LSI Words in Title Tag Relevancy	-0.15	22	5	62 %	79 %
102	DomDetailer Moz Rank Authority	-0.15	8	4	78 %	21 %
103	Variations making whole A Tags Relevancy	-0.15	13	1	30 %	75 %
104	Number of External Links Authority	-0.15	65	17	83 %	70 %
105	DomDetailer Moz Links Authority	-0.15	69294179	15533125	78 %	22 %
106	Variations in Footer Tags Relevancy	-0.15	31	5	35 %	72 %
107	Head Size Kilobytes Size	-0.15	154	36	88 %	73 %
108	Variations Making Whole Span Tags Relevancy	-0.15	12	1	19 %	76 %
109	Leading Variations in H2 Tags Relevancy	-0.15	7	1	21 %	76 %
110	Variations Making Whole LI Tags Relevancy	-0.14	6	1	24 %	72 %
111	Search Result Link Text Length Size	-0.14	90	54	94 %	60 %
112	Has Entities in H2 Tags Relevancy	-0.14	1	1	55 %	40 %
113	Exact Matches in H1 Tags Relevancy	-0.14	2	1	18 %	84 %
114	Variations in TITLE Attributes Relevancy	-0.14	86	9	41 %	76 %
115	DomDetailer Facebook Shares Authority	-0.14	4248773	-9870615	73 %	22 %
116	Has FavIcon Technology	-0.14	1	1	74 %	59 %
117	Title Word Count Size	-0.14	15	9	91 %	60 %
118	Number of H3 Tags Size	-0.14	28	8	66 %	74 %
119	Number of Questions In Headings Size	-0.14	6	2	32 %	74 %
120	Number of Questions Size	-0.14	17	5	62 %	74 %
121	Ahrefs Internal Links Authority	-0.14	460	91	63 %	30 %
122	Meta Description Tag Has Entities Relevancy	-0.14	1	1	64 %	35 %
123	Number of DoFollow External Links Authority	-0.14	59	15	81 %	68 %
124	Has Canonical URL Authority	-0.14	1	1	73 %	66 %
125	Variations in H4-H6 Tags Relevancy	-0.14	7	2	22 %	74 %
126	Ahrefs Linked Root Domains Authority	-0.14	29	8	64 %	30 %
127	Exact Matches in Sentences Relevancy	-0.14	20	2	18 %	89 %
128	Title Length Size	-0.13	92	57	91 %	54 %
129	Variations in Section Tags Relevancy	-0.13	70	15	35 %	73 %
130	Number of H2 Tags Size	-0.13	15	6	72 %	75 %
131	Number of Questions In H2 Tags Size	-0.13	3	1	18 %	69 %
132	Ahrefs Image Backlinks	-0.13	79147	972	19 %	27 %
133	Ahrefs Word Count Size	-0.13	3600	1289	61 %	23 %
134	Has OpenGraph Image Relevancy	-0.13	1	1	52 %	58 %
135	Number of Includes Technology	-0.13	19	9	83 %	48 %
136	Word Count in Meta Description Size	-0.13	45	22	68 %	73 %
137	Number of CSS Includes Technology	-0.13	14	9	83 %	48 %
138	Inline CSS Kilobytes Size	-0.13	133	22	57 %	71 %
139	Variations in I Tags Relevancy	-0.13	21	3	24 %	73 %
140	Has Privacy Policy Trust	-0.13	1	1	49 %	66 %
141	Variations in Value Attributes Relevancy	-0.13	24	2	14 %	68 %
142	Has Entities in H3 Tags Relevancy	-0.13	1	1	47 %	40 %
143	Exact Matches in Meta Description Relevancy	-0.13	2	1	15 %	86 %
144	Percentage of DoFollow Links Authority	-0.13	100	93	89 %	57 %
145	Load Time Milliseconds Performance	-0.13	47513	2482	94 %	59 %
146	Search Result Number of Dirs in Path Other	-0.13	4	2	79 %	59 %
147	Variations in Search Result Summary Relevancy	-0.13	7	3	81 %	63 %
148	Meta Description Length Size	-0.13	282	126	70 %	67 %
149	LSI Words in H2 Tags Relevancy	-0.13	113	14	48 %	81 %
150	Number of NoFollow External Links Authority	-0.13	21	3	25 %	70 %
151	Number of Nofollow Links Authority	-0.13	35	6	35 %	70 %
152	Ahrefs External Links Authority	-0.13	74	17	59 %	28 %
153	Leading Variations in H4-H6 Tags Relevancy	-0.13	6	1	11 %	69 %
154	Number of Email Addresses Trust	-0.13	11	2	37 %	62 %
155	Has OpenGraph Type Relevancy	-0.13	1	1	58 %	55 %
156	Leading Variations in H3 Tags Relevancy	-0.12	8	1	17 %	77 %
157	Variations in Article Tags Relevancy	-0.12	124	18	30 %	72 %
158	LSI Words in Meta Description Tag Relevancy	-0.12	47	9	47 %	77 %
159	Number of Social Accounts Authority	-0.12	4	2	46 %	64 %
160	Variations in Meta Twitter Description Relevancy	-0.12	5	1	21 %	64 %
161	Variations in Meta Twitter Content Relevancy	-0.12	3	1	23 %	60 %
162	Variations in H4 Tags Relevancy	-0.12	6	1	17 %	74 %
163	Variations in Class Attributes Relevancy	-0.12	78	4	23 %	70 %
164	Title Has Sentiment Words Other	-0.12	1	1	15 %	71 %
165	Exact Matches in H2 Tags Relevancy	-0.12	6	1	12 %	91 %
166	Headings Has Question Other	-0.12	1	1	31 %	67 %
167	Variations in ID Attributes Relevancy	-0.12	7	1	10 %	74 %
168	Average Words Per Sentence Size	-0.12	219	48	91 %	63 %
169	Ahrefs Pages Size	-0.12	10	2	64 %	26 %
170	Has Meta Twitter Card Authority	-0.12	1	1	43 %	54 %
171	Percentage of DoFollow External Links Authority	-0.12	32	14	79 %	57 %
172	Number of Instagram Pages Authority	-0.12	12	2	31 %	64 %
173	Has Contact Page Trust	-0.12	1	1	57 %	55 %
174	Has Terms of Service Trust	-0.12	1	1	35 %	66 %
175	Variations Making Whole Strong Tags Relevancy	-0.12	7	1	8 %	70 %
176	Title Has Sales Words Other	-0.12	1	1	15 %	68 %
177	Variations making whole H1-H6 Tags Relevancy	-0.12	2	1	14 %	69 %
178	Percentage of NoFollow External Links Authority	-0.12	16	2	23 %	65 %
179	DomDetailer Majestic GOV Backlinks Authority	-0.12	21394221	2595563	27 %	20 %
180	LSI Words in H1 Tags Relevancy	-0.12	22	5	53 %	76 %
181	Number of Forms Technology	-0.12	14	3	70 %	64 %
182	Number of HTML Comments Size	-0.12	133	26	76 %	65 %
183	Ahrefs Has Domain Rating Authority	-0.12	1	1	77 %	23 %
184	Keywords in pages most used phrase	-0.12	1	1	21 %	69 %
185	Percentage of NoFollow Links Authority	-0.12	19	4	36 %	66 %
186	Ahrefs Has Image Backlinks Authority	-0.12	1	1	18 %	26 %
187	Variations in Form Tags Relevancy	-0.12	4	1	12 %	75 %
188	Has Apple Touch Icon Technology	-0.12	1	1	43 %	56 %
189	Ahrefs Page Size Size	-0.12	77902	25835	62 %	23 %
190	Ahrefs Images Relevancy	-0.12	80	20	58 %	22 %
191	Ahrefs Has Internal Links Authority	-0.12	1	1	61 %	25 %
192	Has JSON-LD AggregateRating	-0.12	1	1	5 %	56 %
193	Number of US Phone Numbers Trust	-0.12	111	7	39 %	68 %
194	Variations in Aside Tags Relevancy	-0.12	72	6	16 %	68 %
195	Number of Twitter Accounts Authority	-0.12	3	1	39 %	61 %
196	Variations in Em Tags Relevancy	-0.12	26	2	13 %	68 %
197	Search Result URL Length Size	-0.11	98	62	93 %	44 %
198	Has Copyright Trust	-0.11	1	1	72 %	59 %
199	Has JSON-LD Answer	-0.11	1	1	3 %	44 %
200	Ahrefs Has External Links Authority	-0.11	1	1	58 %	27 %

Measures 149776 SEO Factors

148054 Built-In SEO Factors

138877 On-page SEO Factors

9177 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 2021-1 previous - today - next