Top SEO Factor data is updated daily for latest "month to date" measurements.
| Name | Correlation | #1 Max | Page 1 Avg | Usage % | Searches % | |
| 1 | Clean Text Kilobytes Size | -0.21 | 134 | 12 | 88 % | 82 % |
| 2 | Unabridged Word Count Size | -0.21 | 27434 | 1949 | 92 % | 77 % |
| 3 | Word Count Size | -0.21 | 7018 | 1445 | 92 % | 76 % |
| 4 | Number of Sentences Size | -0.19 | 1072 | 104 | 90 % | 76 % |
| 5 | Number of Questions Size | -0.18 | 139 | 9 | 69 % | 79 % |
| 6 | Page Size Kilobytes Size | -0.17 | 733 | 227 | 92 % | 77 % |
| 7 | Number of Questions In Headings Size | -0.16 | 12 | 2 | 37 % | 74 % |
| 8 | Inline JavaScript Kilobytes Size | -0.15 | 448 | 63 | 89 % | 73 % |
| 9 | Number of Questions In H2 Tags Size | -0.14 | 4 | 1 | 23 % | 73 % |
| 10 | Number of Prices Size | -0.14 | 1936 | 60 | 73 % | 71 % |
| 11 | Number of Questions In H3 Tags Size | -0.13 | 7 | 1 | 16 % | 69 % |
| 12 | Inline CSS Kilobytes Size | -0.13 | 155 | 50 | 66 % | 71 % |
| 13 | Average Words Per Sentence Size | -0.13 | 285 | 37 | 89 % | 62 % |
| 14 | Title Word Count Size | -0.12 | 19 | 9 | 90 % | 57 % |
| 15 | Search Result Domain Length Size | -0.12 | 28 | 18 | 92 % | 59 % |
| 16 | Search Result Host Length Size | -0.12 | 28 | 18 | 92 % | 56 % |
| 17 | Word Count in Meta Description Size | -0.12 | 84 | 20 | 70 % | 63 % |
| 18 | Title Length Size | -0.12 | 123 | 56 | 90 % | 54 % |
| 19 | Meta Description Length Size | -0.11 | 517 | 123 | 70 % | 63 % |
| 20 | Search Result URL Length Size | -0.11 | 230 | 63 | 98 % | 39 % |
| 21 | Number of Questions In H4 Tags Size | -0.1 | 5 | 1 | 6 % | 63 % |
| 22 | Search Result Summary Length Size | -0.1 | 167 | 147 | 95 % | 48 % |
| 23 | Search Result Link Text Length Size | -0.1 | 57 | 49 | 98 % | 47 % |
| 24 | Bytes To First P Tag Size | -0.09 | 83258 | 61756 | 98 % | 53 % |
| 25 | Number of Questions In H1 Tags Size | -0.08 | 1 | 1 | 6 % | 49 % |
| 26 | Number of Bytes to First Match Size | -0.08 | 9931977 | 826583 | 98 % | 48 % |
| 27 | Number of Questions In H5 Tags Size | -0.07 | 1 | 1 | 2 % | 58 % |
| 28 | Number of Questions In H6 Tags Size | -0.04 | 1 | 0 | 1 % | 53 % |
| 29 | Body Tag Size Kilobytes Size | -0.02 | 242 | 10 | 7 % | 82 % |
| 30 | Head Size Kilobytes Size | -0.01 | 99 | 3 | 6 % | 82 % |
| 31 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 57 % |
| 32 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 57 % |
| 33 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 57 % |
| 34 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 57 % |
| 35 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 57 % |
| 36 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 82 % |