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 | -0.18 | 169 | 13 | 69 % | 87 % |
| 2 | Unabridged Word Count Size | -0.18 | 26171 | 1880 | 84 % | 88 % |
| 3 | Word Count Size | -0.18 | 20567 | 1530 | 84 % | 88 % |
| 4 | Number of Questions In Headings Size | -0.16 | 7 | 2 | 36 % | 85 % |
| 5 | Average Words Per Sentence Size | -0.15 | 181 | 25 | 74 % | 81 % |
| 6 | Number of Sentences Size | -0.15 | 1334 | 138 | 80 % | 83 % |
| 7 | Number of Questions In H2 Tags Size | -0.14 | 3 | 1 | 24 % | 80 % |
| 8 | Inline CSS Kilobytes Size | -0.14 | 160 | 59 | 64 % | 80 % |
| 9 | Number of Questions In H3 Tags Size | -0.14 | 5 | 2 | 18 % | 78 % |
| 10 | Search Result Domain Length Size | -0.14 | 24 | 17 | 84 % | 80 % |
| 11 | Search Result Host Length Size | -0.14 | 24 | 17 | 84 % | 80 % |
| 12 | Page Size Kilobytes Size | -0.13 | 602 | 285 | 83 % | 63 % |
| 13 | Number of Questions Size | -0.13 | 101 | 12 | 64 % | 74 % |
| 14 | Search Result Summary Length Size | -0.12 | 247 | 161 | 98 % | 68 % |
| 15 | Word Count in Meta Description Size | -0.12 | 40 | 18 | 67 % | 75 % |
| 16 | Meta Description Length Size | -0.12 | 268 | 114 | 67 % | 74 % |
| 17 | Title Word Count Size | -0.12 | 24 | 8 | 82 % | 72 % |
| 18 | Number of Prices Size | -0.12 | 572 | 112 | 66 % | 75 % |
| 19 | Inline JavaScript Kilobytes Size | -0.11 | 419 | 111 | 77 % | 60 % |
| 20 | Title Length Size | -0.11 | 159 | 52 | 82 % | 73 % |
| 21 | Search Result Link Text Length Size | -0.11 | 56 | 47 | 98 % | 55 % |
| 22 | Search Result URL Length Size | -0.1 | 91 | 60 | 99 % | 35 % |
| 23 | Number of Questions In H4 Tags Size | -0.09 | 2 | 1 | 5 % | 74 % |
| 24 | Bytes To First P Tag Size | -0.09 | 92042 | 70062 | 99 % | 36 % |
| 25 | Number of Bytes to First Match Size | -0.08 | 9828359 | 1666170 | 98 % | 43 % |
| 26 | Number of Questions In H1 Tags Size | -0.06 | 1 | 1 | 2 % | 67 % |
| 27 | Number of Questions In H5 Tags Size | -0.06 | 2 | 1 | 1 % | 79 % |
| 28 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 1 % | 79 % |
| 29 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 86 % |
| 30 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 86 % |
| 31 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 86 % |
| 32 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 86 % |
| 33 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 86 % |
| 34 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 99 % |
| 35 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 99 % |
| 36 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 99 % |