200 Top SEO Ranking Factors May 2026

TOP SEO Factors for 2026-05 previous

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 Top 50 Shared Factors Used Diversity	-0.24	15	11	97 %	97 %
2	Number of Top 100 Shared Factors Used Diversity	-0.24	35	27	98 %	97 %
3	Number of Top 200 Shared Factors Used Diversity	-0.23	46	36	98 %	97 %
4	Number of Unique LSI Words Used Diversity	-0.23	576	274	82 %	78 %
5	Entities in H2 Tags	-0.23	46	7	45 %	97 %
6	Entities in H1 Tags	-0.23	4	2	44 %	86 %
7	Entities in Title Tag Relevancy	-0.22	5	3	63 %	95 %
8	Entities in Sentences Relevancy	-0.22	316	121	67 %	97 %
9	Entities in H3 Tags	-0.22	15	6	37 %	97 %
10	Number of Unique Variations Used Diversity	-0.22	18	5	73 %	78 %
11	Variations in H1, H2, and H3 Tags Relevancy	-0.22	378	35	52 %	97 %
12	Has Entities in H1 Tags Relevancy	-0.22	1	1	50 %	89 %
13	Entities in the HTML Tag Relevancy	-0.22	317	123	74 %	97 %
14	Variations in Search Result Document File Name Relevancy	-0.22	8	2	42 %	84 %
15	Variations in H1 and H2 Tags Relevancy	-0.21	287	20	51 %	97 %
16	Variations in H1-H6 Tags Relevancy	-0.21	409	41	53 %	95 %
17	Has Entities in H2 Tags Relevancy	-0.21	1	1	48 %	89 %
18	Search Result Domain is .com, .net, or .org Other	-0.21	1	1	7 %	89 %
19	Average Words Per Sentence Size	-0.21	65	30	69 %	84 %
20	Uses Schema sku Other	-0.21	1	1	11 %	24 %
21	Number of Factors Used Diversity	-0.2	233	165	98 %	89 %
22	Variations in Div Tags Relevancy	-0.2	68329	5571	66 %	92 %
23	Number of Distinct Entities Used Diversity	-0.2	49	28	82 %	97 %
24	Search Result Domain is .com Other	-0.2	1	1	7 %	89 %
25	Title Tag Has Entities Relevancy	-0.2	1	1	66 %	81 %
26	Leading Variations in H1, H2, and H3 Tags Relevancy	-0.2	32	4	39 %	95 %
27	Variations in P Tags Relevancy	-0.2	4557	510	56 %	97 %
28	Variations in the Canonical URL Relevancy	-0.2	50	8	44 %	81 %
29	Number of P Tags Size	-0.2	75	33	64 %	95 %
30	Variations in Search Result URL Path Relevancy	-0.2	10	3	44 %	86 %
31	Number of Images with ALT Text Size	-0.2	304	33	60 %	92 %
32	Variations in the Title Tag Relevancy	-0.2	23	4	57 %	84 %
33	Variations in A Tag HREF Attributes Relevancy	-0.19	2876	297	51 %	84 %
34	Has Entities in H3 Tags Relevancy	-0.19	1	1	40 %	95 %
35	Number of Heading Tags Size	-0.19	37	18	66 %	97 %
36	Variations in First 100 Words Relevancy	-0.19	177	24	59 %	89 %
37	Unabridged Word Count Size	-0.19	9873	1923	81 %	92 %
38	Variation Count in Top 30KB Relevancy	-0.19	4928	399	58 %	89 %
39	Uses JSON-LD sku Other	-0.19	1	1	11 %	24 %
40	Variations in Body Tags Relevancy	-0.19	93621	6046	69 %	78 %
41	Variations in HTML Tags Relevancy	-0.19	93621	6046	69 %	78 %
42	Variations in H2 Tags Relevancy	-0.19	280	19	37 %	89 %
43	Number of H1 Tags Size	-0.19	2	1	61 %	100 %
44	Entities in Meta Description Tag Relevancy	-0.19	6	3	54 %	84 %
45	Word Count Size	-0.19	2930	1314	82 %	95 %
46	Number of Images Size	-0.19	309	42	67 %	97 %
47	Variations in Search Result Display URL Relevancy	-0.19	19	3	74 %	81 %
48	Variations in Search Result Link Text Relevancy	-0.19	19	3	74 %	81 %
49	Load Time Milliseconds Performance	-0.19	2818	1028	82 %	84 %
50	Leading Variations in H1-H6 Tags Relevancy	-0.19	36	5	41 %	95 %
51	Clean Text Kilobytes Size	-0.19	54	13	63 %	92 %
52	Variations in H1 Tags Relevancy	-0.18	20	3	44 %	97 %
53	Variations in Distinct A Tag HREF Attributes Relevancy	-0.18	1808	192	50 %	86 %
54	Number of HTML Tags Size	-0.18	2293	1074	82 %	92 %
55	Number of H3 Tags Size	-0.18	14	7	50 %	89 %
56	Clean Keyword Density in the HTML Tag Relevancy	-0.18	203	42	67 %	81 %
57	Variations in LI Tags Relevancy	-0.18	2914	348	52 %	95 %
58	Number of H2 Tags Size	-0.18	23	6	58 %	95 %
59	Number of Internal Links Authority	-0.18	311	120	71 %	86 %
60	Number of HTML Comments Size	-0.18	166	50	63 %	95 %
61	Variations in Main Tags Relevancy	-0.18	40166	2916	35 %	95 %
62	Variations in A Tags Relevancy	-0.18	9305	686	56 %	92 %
63	Variations in ALT Attributes Relevancy	-0.18	588	31	39 %	95 %
64	Variations in Span Tags Relevancy	-0.17	1077	103	46 %	92 %
65	Number of Forms Technology	-0.17	9	2	45 %	81 %
66	Variations in Search Result URL Relevancy	-0.17	21	4	55 %	81 %
67	Number of Links Authority	-0.17	318	134	72 %	92 %
68	Number of External Links Authority	-0.17	29	15	68 %	95 %
69	Number of Includes Technology	-0.17	38	27	74 %	73 %
70	Number of HTTPS Links Authority	-0.17	318	132	72 %	92 %
71	Variations in Absolute URLs Relevancy	-0.17	14393	1374	57 %	89 %
72	Number Of JSON-LD Types Relevancy	-0.17	55	11	47 %	86 %
73	Number of Backlinks Authority	-0.17	109241	10407	53 %	81 %
74	Number of DoFollow External Links Authority	-0.17	28	12	67 %	95 %
75	Term Frequency Relevancy	-0.17	6	3	71 %	92 %
76	Number of Referring Domains Authority	-0.17	1760	204	53 %	81 %
77	Variations in H3 Tags Relevancy	-0.17	123	14	28 %	92 %
78	Number of DoFollow Links Authority	-0.17	315	127	72 %	95 %
79	Leading Variations in H1 Tags Relevancy	-0.17	2	1	29 %	97 %
80	Variations in OpenGraph Title Relevancy	-0.17	16	3	47 %	84 %
81	Has JSON-LD Schema Markup Relevancy	-0.17	1	1	45 %	84 %
82	Number of Questions In Headings Size	-0.17	5	2	25 %	84 %
83	Variations in OpenGraph Description Relevancy	-0.17	45	7	43 %	84 %
84	Number of CSS Includes Technology	-0.17	14	9	68 %	70 %
85	Percentage of DoFollow Links Authority	-0.17	93	75	72 %	95 %
86	Title Word Count Size	-0.17	12	8	80 %	76 %
87	Variations in Sentences Relevancy	-0.17	8372	740	64 %	95 %
88	Number of Do Follow Backlinks Authority	-0.17	61547	7600	50 %	78 %
89	Uses JSON-LD description Other	-0.17	1	1	34 %	81 %
90	TF/IDF Relevancy	-0.16	2	1	57 %	92 %
91	Has Form Technology	-0.16	1	1	46 %	78 %
92	Headings Has Question Other	-0.16	1	1	25 %	81 %
93	Has Canonical URL Authority	-0.16	1	1	65 %	81 %
94	LSI Words in Sentences Relevancy	-0.16	2378	654	56 %	97 %
95	Uses JSON-LD Organization Other	-0.16	1	1	29 %	84 %
96	Inline CSS Kilobytes Size	-0.16	189	59	64 %	84 %
97	Number of Images without ALT Text Size	-0.16	22	10	50 %	100 %
98	Has Meta Charset Technology	-0.16	1	1	69 %	89 %
99	Number of Facebook Pages Authority	-0.16	3	2	44 %	86 %
100	Uses JSON-LD applicableCountry Other	-0.16	1	1	4 %	14 %
101	Title Length Size	-0.16	68	48	80 %	78 %
102	Search Result Number of Dirs in Path Other	-0.16	3	2	70 %	78 %
103	Variations in Meta Description Relevancy	-0.16	49	6	46 %	81 %
104	Search Result Uses HTTPS Other	-0.16	1	1	82 %	89 %
105	Meta Description Tag Has Entities Relevancy	-0.16	1	1	56 %	76 %
106	Leading Variations in H2 Tags Relevancy	-0.16	22	2	25 %	86 %
107	Variation Density in Top 30KB Relevancy	-0.16	310	54	58 %	95 %
108	Percentage of DoFollow Internal Links Authority	-0.16	86	64	71 %	89 %
109	Number of US Phone Numbers Trust	-0.16	98	10	34 %	92 %
110	Variations in Nav Tags Relevancy	-0.15	7034	940	39 %	81 %
111	Leading Variations in Title Tag Relevancy	-0.15	1	1	32 %	95 %
112	Meta Description Length Size	-0.15	150	108	58 %	65 %
113	Variations in Section Tags Relevancy	-0.15	1250	157	32 %	89 %
114	LSI Words in H2 Tags Relevancy	-0.15	91	19	46 %	97 %
115	Has US Phone Number Trust	-0.15	1	1	33 %	84 %
116	Number of No Follow Backlinks Authority	-0.15	47695	3232	39 %	73 %
117	Uses Schema brand Other	-0.15	1	1	10 %	24 %
118	Is Article Page Other	-0.15	1	1	31 %	70 %
119	Uses JSON-LD OfferShippingDetails Other	-0.15	1	1	4 %	14 %
120	Has Terms of Service Trust	-0.15	1	1	41 %	49 %
121	Uses Schema offer Other	-0.15	1	1	13 %	49 %
122	Variations in Footer Tags Relevancy	-0.15	6817	413	32 %	86 %
123	Uses JSON-LD name Other	-0.15	1	1	45 %	86 %
124	Uses Schema organization Other	-0.15	1	1	30 %	81 %
125	Flesch Kincaid Reading Grade Level Other	-0.15	3	0	91 %	92 %
126	Uses Microdata url Other	-0.15	1	1	7 %	19 %
127	Number of Questions In H2 Tags Size	-0.15	2	1	16 %	70 %
128	Uses JSON-LD ShippingDeliveryTime Other	-0.15	1	1	4 %	14 %
129	Uses Schema shippingdeliverytime Other	-0.15	1	1	4 %	14 %
130	Number of JavaScript Includes Technology	-0.15	29	19	75 %	81 %
131	Has Schema Markup Relevancy	-0.15	1	1	57 %	73 %
132	Has OpenGraph Image Relevancy	-0.15	1	1	52 %	76 %
133	Uses JSON-LD DefinedRegion Other	-0.15	1	1	4 %	14 %
134	Variations in the last 100 words Relevancy	-0.15	176	27	47 %	70 %
135	Uses Schema url Other	-0.15	1	1	47 %	62 %
136	Entities in H4 Tags	-0.15	21	2	17 %	92 %
137	Search Result Link Text Length Size	-0.15	54	46	97 %	35 %
138	Uses Schema product Other	-0.15	1	1	13 %	43 %
139	Word Count in Meta Description Size	-0.15	25	18	59 %	70 %
140	Is Home Page Other	-0.15	1	1	26 %	38 %
141	Number of Sentences Size	-0.15	332	150	78 %	89 %
142	Uses Microdata Product Other	-0.15	1	1	4 %	16 %
143	Uses Schema applicablecountry Other	-0.15	1	1	4 %	14 %
144	Percentage of DoFollow External Links Authority	-0.14	20	12	66 %	89 %
145	Uses Schema description Other	-0.14	1	1	41 %	65 %
146	Search Result Summary Length Size	-0.14	157	151	97 %	65 %
147	Leading Variations in H3 Tags Relevancy	-0.14	9	2	18 %	81 %
148	Variations in TITLE Attributes Relevancy	-0.14	1571	78	35 %	76 %
149	Uses Schema offershippingdetails Other	-0.14	1	1	5 %	14 %
150	Uses JSON-LD brand	-0.14	1	1	7 %	32 %
151	Has FavIcon Technology	-0.14	1	1	71 %	73 %
152	LSI Words in H1 Tags Relevancy	-0.14	10	4	45 %	95 %
153	Uses JSON-LD unitCode Other	-0.14	1	1	4 %	22 %
154	Uses Schema unitcode Other	-0.14	1	1	4 %	22 %
155	Uses JSON-LD identifier Other	-0.14	1	1	3 %	14 %
156	Has Meta Twitter Card Authority	-0.14	1	1	47 %	59 %
157	Number of Prices Size	-0.14	453	122	63 %	70 %
158	Uses Schema logo Other	-0.14	1	1	12 %	70 %
159	Number of Questions In H3 Tags Size	-0.14	4	1	12 %	86 %
160	Number of LinkedIn Pages Authority	-0.14	2	1	21 %	73 %
161	Search Result Domain Length Size	-0.14	20	16	84 %	95 %
162	Search Result Host Length Size	-0.14	20	16	84 %	95 %
163	Percentage of NoFollow Links Authority	-0.14	4	2	19 %	73 %
164	Number Of Claimed Brands Other	-0.14	3	1	19 %	81 %
165	Uses JSON-LD url Other	-0.14	1	1	41 %	84 %
166	Has Meta Viewport Technology	-0.14	1	1	79 %	84 %
167	Number of H5 Tags Size	-0.14	5	2	14 %	78 %
168	Uses JSON-LD priceValidUntil Other	-0.14	1	1	8 %	24 %
169	Uses JSON-LD Product Other	-0.14	1	1	11 %	46 %
170	Uses JSON-LD MerchantReturnPolicy Other	-0.14	1	1	5 %	19 %
171	Uses Schema definedregion Other	-0.14	1	1	4 %	14 %
172	Variations in Article Tags Relevancy	-0.14	3771	231	17 %	89 %
173	LSI Words in H3 Tags Relevancy	-0.14	97	18	39 %	95 %
174	Uses JSON-LD headline Other	-0.14	1	1	17 %	54 %
175	LSI Words in Title Tag Relevancy	-0.14	11	5	62 %	95 %
176	Uses JSON-LD ImageObject Other	-0.14	1	1	23 %	78 %
177	Number of NoFollow External Links Authority	-0.14	10	3	12 %	76 %
178	Uses Schema headline Other	-0.14	1	1	17 %	54 %
179	Number of Social Accounts Authority	-0.14	8	1	31 %	92 %
180	Variations in Strong Tags Relevancy	-0.14	289	23	22 %	86 %
181	Variations in Button Tags Relevancy	-0.14	5433	404	17 %	89 %
182	Uses RDFa description Other	-0.14	1	1	1 %	14 %
183	Is OpenGraph Type Article Technology	-0.14	1	1	18 %	65 %
184	Search Result URL Length Size	-0.14	77	60	98 %	57 %
185	Entities in H5 Tags	-0.13	2	1	7 %	76 %
186	Is Store Page Other	-0.13	1	1	48 %	76 %
187	Number of Absolute URLs Authority	-0.13	586	290	82 %	84 %
188	Uses Schema website Other	-0.13	1	1	22 %	73 %
189	Has Meta Description Relevancy	-0.13	1	1	59 %	73 %
190	Uses JSON-LD logo Other	-0.13	1	1	11 %	78 %
191	Has Meta Robots Other	-0.13	1	1	22 %	73 %
192	Number of Nofollow Links Authority	-0.13	15	6	21 %	86 %
193	Uses Schema pricevaliduntil Other	-0.13	1	1	8 %	24 %
194	Uses Schema email Other	-0.13	1	1	7 %	65 %
195	Uses Schema name Other	-0.13	1	1	52 %	76 %
196	Variations in B Tags Relevancy	-0.13	204	21	9 %	92 %
197	Page Size Kilobytes Size	-0.13	596	358	81 %	59 %
198	Number of Instagram Pages Authority	-0.13	7	2	38 %	73 %
199	Variations in Value Attributes Relevancy	-0.13	151	13	13 %	65 %
200	Uses JSON-LD WebSite Other	-0.13	1	1	22 %	76 %

Measures 150517 SEO Factors

148795 Built-In SEO Factors

139593 On-page SEO Factors

9202 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 2026-05 previous