200 Top SEO Ranking Factors May 2021

TOP SEO Factors for 2021-5 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	-0.3	63	27	87 %	49 %
2	Number of Factors Used Diversity	-0.25	204	137	96 %	84 %
3	Variations in HTML Tags Relevancy	-0.25	21199	260	89 %	91 %
4	Variations in Body Tags Relevancy	-0.24	20696	229	81 %	91 %
5	Term Frequency Relevancy	-0.24	11	6	89 %	90 %
6	Variations in P Tags Relevancy	-0.24	1435	37	79 %	90 %
7	Variations in Div Tags Relevancy	-0.24	15197	188	87 %	91 %
8	Variations in A Tags Relevancy	-0.24	1896	35	81 %	91 %
9	Variations in H1-H6 Tags Relevancy	-0.23	162	9	81 %	91 %
10	Variations in H1, H2, and H3 Tags Relevancy	-0.23	110	8	80 %	89 %
11	LSI Words in Sentences Relevancy	-0.23	3766	530	79 %	91 %
12	Variations in Search Result Display URL Relevancy	-0.23	17	2	89 %	75 %
13	Variations in Search Result Link Text Relevancy	-0.23	17	2	88 %	75 %
14	Entities in Title Tag Relevancy	-0.23	6	3	80 %	44 %
15	Search Result Has Publish Date	-0.22	1	1	84 %	12 %
16	Variations in A Tag HREF Attributes Relevancy	-0.22	1346	57	79 %	89 %
17	Ahrefs Rank Authority	-0.22	42	17	87 %	18 %
18	Variations in LI Tags Relevancy	-0.21	754	21	72 %	90 %
19	Variations in Sentences Relevancy	-0.21	1072	24	78 %	87 %
20	Clean Keyword Density in the HTML Tag Relevancy	-0.21	202	7	84 %	30 %
21	Variations in H1 and H2 Tags Relevancy	-0.21	59	5	77 %	89 %
22	Ahrefs Referring Class C Addresses Authority	-0.21	521	48	60 %	18 %
23	Ahrefs Referring IP Addresses Authority	-0.21	706	62	60 %	18 %
24	Ahrefs Referring Domains Authority	-0.21	860	65	60 %	18 %
25	Entities in H2 Tags	-0.2	26	6	53 %	46 %
26	Unabridged Word Count Size	-0.2	14503	1744	93 %	88 %
27	Clean Text Kilobytes Size	-0.2	70	11	90 %	83 %
28	Entities in H3 Tags	-0.2	24	6	43 %	47 %
29	Word Count Size	-0.2	4271	1343	93 %	87 %
30	Body Tag Size Kilobytes Size	-0.2	185	84	80 %	88 %
31	Variations in the Title Tag Relevancy	-0.19	20	2	83 %	74 %
32	Variations in Script Tags Relevancy	-0.19	16393	86	67 %	91 %
33	Ahrefs Backlinks Authority	-0.19	48081	2449	60 %	19 %
34	Ahrefs Referring Pages Authority	-0.19	48081	2449	60 %	19 %
35	Ahrefs Text Backlinks Authority	-0.19	48078	2415	59 %	19 %
36	Variations in ALT Attributes Relevancy	-0.19	165	10	55 %	87 %
37	Leading Variations in H1-H6 Tags Relevancy	-0.19	19	3	54 %	88 %
38	Number of HTML Tags Size	-0.19	2137	873	94 %	82 %
39	Entities in H1 Tags	-0.19	5	2	62 %	41 %
40	Variations in H2 Tags Relevancy	-0.19	42	4	48 %	89 %
41	Keywords in pages top 10 most used phrases	-0.19	21	2	72 %	85 %
42	Entities in H4 Tags	-0.19	11	3	24 %	44 %
43	Ahrefs NoFollow Backlinks Authority	-0.19	32039	521	51 %	19 %
44	LSI Words in Title Tag Relevancy	-0.19	17	6	78 %	86 %
45	Page Size Kilobytes Size	-0.19	292	146	94 %	84 %
46	Variations in Absolute URLs Relevancy	-0.19	1808	56	71 %	89 %
47	Leading Variations in H1, H2, and H3 Tags Relevancy	-0.19	14	2	51 %	87 %
48	DomDetailer Majestic Referring Domains Authority	-0.19	1730885	412076	91 %	33 %
49	Exact Matches in Body Tag Relevancy	-0.19	232	11	35 %	88 %
50	DomDetailer Majestic IPs Authority	-0.18	228568	60525	91 %	33 %
51	Keywords in pages top 5 most used phrases	-0.18	11	2	61 %	86 %
52	DomDetailer Majestic Referring Subnets Authority	-0.18	50780	15382	91 %	33 %
53	Number of Sentences Size	-0.18	159	43	90 %	82 %
54	Variations in Span Tags Relevancy	-0.18	575	13	61 %	87 %
55	Exact Matches in the HTML Tag Relevancy	-0.18	273	6	36 %	86 %
56	Number of P Tags Size	-0.18	134	35	87 %	81 %
57	Number of HTTPS Links Authority	-0.18	427	148	89 %	82 %
58	Variations in the Canonical URL Relevancy	-0.18	15	2	55 %	76 %
59	Variations in Search Result URL Relevancy	-0.18	16	2	68 %	76 %
60	Keywords in pages top 3 most used phrases	-0.18	6	1	52 %	84 %
61	Variations in Search Result URL Path Relevancy	-0.18	9	2	65 %	74 %
62	Variations in First 100 Words Relevancy	-0.17	206	9	73 %	77 %
63	Number of Links Authority	-0.17	446	154	90 %	81 %
64	Number of DoFollow Links Authority	-0.17	429	148	90 %	80 %
65	Variations in H3 Tags Relevancy	-0.17	51	3	36 %	87 %
66	Number of Internal Links Authority	-0.17	437	137	90 %	82 %
67	Ahrefs Has Backlinks Authority	-0.17	1	1	58 %	17 %
68	Ahrefs Has Text Backlinks Authority	-0.17	1	1	57 %	17 %
69	Number of Questions In Headings Size	-0.17	7	2	35 %	57 %
70	Ahrefs Dofollow Backlinks Authority	-0.17	44358	2200	48 %	19 %
71	Variations in Nav Tags Relevancy	-0.17	3255	30	49 %	84 %
72	DomDetailer Moz PA Authority	-0.17	63	40	93 %	30 %
73	Number of Heading Tags Size	-0.17	52	20	89 %	84 %
74	Number of Questions Size	-0.17	46	5	61 %	77 %
75	Variations in H1 Tags Relevancy	-0.17	17	2	68 %	74 %
76	LSI Words in H2 Tags Relevancy	-0.17	77	15	59 %	89 %
77	Ahrefs Domain Rating Authority	-0.17	85	45	84 %	17 %
78	Ahrefs Has NoFollow Backlinks Authority	-0.17	1	1	49 %	18 %
79	TF/IDF Relevancy	-0.17	1	1	73 %	77 %
80	DomDetailer Majestic Links Authority	-0.17	137677355	15635318	90 %	32 %
81	Entities in Meta Description Tag Relevancy	-0.17	11	4	62 %	43 %
82	Number of Absolute URLs Authority	-0.16	500	144	91 %	79 %
83	Variations in OpenGraph Description Relevancy	-0.16	36	2	51 %	77 %
84	Has Entities in H1 Tags Relevancy	-0.16	1	1	64 %	40 %
85	Number of Images with ALT Text Size	-0.16	146	19	83 %	79 %
86	DomDetailer Moz Links Authority	-0.16	78741107	18907242	90 %	34 %
87	DomDetailer Majestic CF Authority	-0.16	60	33	89 %	30 %
88	Variations in Search Result Document File Name Relevancy	-0.16	7	2	61 %	68 %
89	DomDetailer Moz Rank Authority	-0.16	9	5	90 %	29 %
90	Variations in OpenGraph Title Relevancy	-0.16	13	2	60 %	69 %
91	Variations in Meta Description Relevancy	-0.16	44	2	62 %	82 %
92	DomDetailer Majestic TF Authority	-0.16	60	27	79 %	28 %
93	Number of Images Size	-0.16	183	29	89 %	80 %
94	DomDetailer Moz DA Authority	-0.16	81	41	93 %	30 %
95	Exact Matches in H1-H6 Tags Relevancy	-0.16	13	1	26 %	86 %
96	Variations in Strong Tags Relevancy	-0.16	85	3	33 %	81 %
97	LSI Words in H1 Tags Relevancy	-0.15	15	5	66 %	82 %
98	Variations in TITLE Attributes Relevancy	-0.15	150	9	40 %	84 %
99	Ahrefs Word Count Size	-0.15	2403	1177	61 %	14 %
100	Has Entities in H3 Tags Relevancy	-0.15	1	1	46 %	42 %
101	Variations in Footer Tags Relevancy	-0.15	1918	15	35 %	81 %
102	LSI Words in H3 Tags Relevancy	-0.15	83	15	53 %	90 %
103	Inline JavaScript Kilobytes Size	-0.15	113	34	88 %	79 %
104	Has Entities in H2 Tags Relevancy	-0.15	1	1	55 %	40 %
105	Leading Variations in H1 Tags Relevancy	-0.15	2	1	34 %	75 %
106	Leading Variations in H2 Tags Relevancy	-0.15	7	1	24 %	80 %
107	Number of H2 Tags Size	-0.15	18	6	73 %	82 %
108	LSI Words in Meta Description Tag Relevancy	-0.15	33	10	60 %	85 %
109	Number of H3 Tags Size	-0.15	27	7	66 %	83 %
110	Variations in the last 100 words Relevancy	-0.15	204	6	60 %	76 %
111	Search Result Publish Date	-0.15	2002250819	1895587508	93 %	38 %
112	Variations in Main Tags Relevancy	-0.15	2809	56	32 %	79 %
113	Ahrefs Has Dofollow Backlinks Authority	-0.15	1	1	48 %	17 %
114	Entities in Sentences Relevancy	-0.15	442	62	47 %	93 %
115	Variations making whole A Tags Relevancy	-0.15	5	2	34 %	80 %
116	Variations Making Whole Span Tags Relevancy	-0.15	8	1	22 %	80 %
117	Leading Variations in Title Tag Relevancy	-0.15	1	1	38 %	73 %
118	Title Tag Has Entities Relevancy	-0.15	1	1	80 %	36 %
119	Headings Has Question Other	-0.15	1	1	31 %	73 %
120	Leading Variations in H3 Tags Relevancy	-0.15	7	1	17 %	78 %
121	DomDetailer Facebook Shares Authority	-0.15	5782826	-6048902	78 %	32 %
122	Has Entities in H4 Tags Relevancy	-0.15	1	1	26 %	39 %
123	Number of External Links Authority	-0.15	58	17	85 %	72 %
124	Variations in Search Result Summary Relevancy	-0.14	47	3	89 %	68 %
125	Variations in H4-H6 Tags Relevancy	-0.14	61	2	22 %	80 %
126	Load Time Milliseconds Performance	-0.14	27367	2634	94 %	64 %
127	Variations Making Whole LI Tags Relevancy	-0.14	4	1	28 %	78 %
128	Variations in Section Tags Relevancy	-0.14	844	20	38 %	81 %
129	Variations in H4 Tags Relevancy	-0.14	30	2	17 %	80 %
130	Exact Matches in A Tags Relevancy	-0.14	66	2	20 %	86 %
131	Ahrefs Internal Links Authority	-0.14	371	85	66 %	17 %
132	Has JSON-LD Answer	-0.14	1	1	4 %	46 %
133	Number of Questions In H2 Tags Size	-0.14	3	1	18 %	76 %
134	Ahrefs Linked Root Domains Authority	-0.14	27	8	67 %	18 %
135	Has JSON-LD Question	-0.14	1	1	4 %	47 %
136	Head Size Kilobytes Size	-0.14	105	37	87 %	74 %
137	Variations making whole H1-H6 Tags Relevancy	-0.14	2	1	18 %	76 %
138	Variations making whole H1, H2, and H3 Tags Relevancy	-0.14	2	1	16 %	73 %
139	Has Privacy Policy Trust	-0.14	1	1	58 %	67 %
140	Keywords in pages most used phrase	-0.14	2	1	29 %	76 %
141	Exact Matches in Title Tag Relevancy	-0.14	2	1	24 %	77 %
142	DomDetailer Majestic GOV Backlinks Authority	-0.14	20785026	4419730	38 %	30 %
143	Search Result Link Text Length Size	-0.14	80	53	96 %	58 %
144	Entities in the HTML Tag Relevancy	-0.14	2532	228	49 %	93 %
145	Title Has Sentiment Words Other	-0.14	1	1	15 %	69 %
146	Number of Questions In H3 Tags Size	-0.14	4	1	13 %	72 %
147	Percentage of DoFollow Internal Links Authority	-0.14	93	79	89 %	66 %
148	Variations in ID Attributes Relevancy	-0.14	286	3	13 %	77 %
149	Number of Nofollow Links Authority	-0.14	46	6	35 %	76 %
150	Title Has Sales Words Other	-0.14	1	1	14 %	67 %
151	Number of DoFollow External Links Authority	-0.13	51	14	83 %	70 %
152	Has Canonical URL Authority	-0.13	1	1	75 %	67 %
153	Number of US Phone Numbers Trust	-0.13	59	7	42 %	70 %
154	Inline CSS Kilobytes Size	-0.13	64	24	58 %	76 %
155	Search Result Uses HTTPS Other	-0.13	1	1	89 %	67 %
156	Variations in I Tags Relevancy	-0.13	62	3	22 %	76 %
157	Ahrefs Pages Size	-0.13	6	2	66 %	15 %
158	Has FavIcon Technology	-0.13	1	1	76 %	61 %
159	Number of NoFollow External Links Authority	-0.13	20	3	23 %	75 %
160	Flesch Kincaid Reading Grade Level Other	-0.13	7	3	89 %	45 %
161	Variations in Class Attributes Relevancy	-0.13	4191	28	27 %	76 %
162	Exact Matches in Sentences Relevancy	-0.13	23	2	19 %	86 %
163	Search Result Number of Dirs in Path Other	-0.13	4	2	79 %	61 %
164	Number of JavaScript Includes Technology	-0.13	56	14	86 %	62 %
165	Number of LinkedIn Pages Authority	-0.13	2	1	20 %	62 %
166	Percentage of DoFollow Links Authority	-0.13	100	92	89 %	61 %
167	LSI Words in H4 Tags Relevancy	-0.13	28	7	33 %	83 %
168	Number of Social Accounts Authority	-0.13	5	2	50 %	65 %
169	Percentage of NoFollow Links Authority	-0.13	22	4	33 %	68 %
170	Number of Social Pages Authority	-0.13	8	2	58 %	66 %
171	Variations in Article Tags Relevancy	-0.13	470	19	30 %	74 %
172	Ahrefs External Links Authority	-0.13	52	17	63 %	17 %
173	Has Copyright Trust	-0.13	1	1	73 %	63 %
174	Variations in Value Attributes Relevancy	-0.12	48	2	14 %	71 %
175	Number of H4 Tags Size	-0.12	10	4	43 %	75 %
176	Exact Matches in H1 Tags Relevancy	-0.12	2	1	18 %	76 %
177	Variations making whole H1 Tags Relevancy	-0.12	1	1	11 %	73 %
178	Number of Forms Technology	-0.12	13	3	71 %	63 %
179	Ahrefs Has Internal Links Authority	-0.12	1	1	64 %	15 %
180	Percentage of NoFollow External Links Authority	-0.12	16	2	22 %	68 %
181	Number of Twitter Accounts Authority	-0.12	2	1	42 %	66 %
182	Word Count in Meta Description Size	-0.12	110	22	69 %	71 %
183	Has Contact Page Trust	-0.12	1	1	69 %	52 %
184	Ahrefs Page Size Size	-0.12	53015	23714	62 %	12 %
185	Has Terms of Service Trust	-0.12	1	1	42 %	65 %
186	Ahrefs Image Backlinks	-0.12	132987	1655	19 %	15 %
187	Meta Description Length Size	-0.12	627	132	70 %	71 %
188	Number of HREF Lang Tags Size	-0.12	15	2	10 %	72 %
189	Number of Instagram Pages Authority	-0.12	9	2	39 %	65 %
190	Ahrefs Has External Links Authority	-0.12	1	1	61 %	15 %
191	Variations in Meta Twitter Description Relevancy	-0.12	20	1	22 %	69 %
192	Number of Images without ALT Text Size	-0.12	41	11	66 %	71 %
193	Variations in B Tags Relevancy	-0.12	57	2	12 %	72 %
194	Has US Phone Number Trust	-0.12	1	1	42 %	54 %
195	Ahrefs Has Linked Root Domains Authority	-0.12	1	1	64 %	16 %
196	Number of HTML Comments Size	-0.12	95	29	75 %	73 %
197	Exact Matches in H2 Tags Relevancy	-0.12	5	1	11 %	83 %
198	Has JSON-LD Review	-0.12	1	1	4 %	42 %
199	Has Schema Markup Relevancy	-0.12	1	1	50 %	59 %
200	Leading Variations in H4-H6 Tags Relevancy	-0.12	7	1	11 %	75 %

Measures 149770 SEO Factors

148048 Built-In SEO Factors

138871 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 2021-5 previous - today - next