Top SEO Factor data is updated daily for latest "month to date" measurements.
| Name | Correlation | #1 Max | Page 1 Avg | Usage % | Searches % | |
| 1 | Word Count Size | -0.24 | 12278 | 1373 | 70 % | 87 % |
| 2 | Clean Text Kilobytes Size | -0.24 | 284 | 13 | 56 % | 84 % |
| 3 | Unabridged Word Count Size | -0.24 | 56122 | 2001 | 70 % | 86 % |
| 4 | Average Words Per Sentence Size | -0.21 | 287 | 31 | 60 % | 85 % |
| 5 | Number of Sentences Size | -0.19 | 766 | 129 | 67 % | 84 % |
| 6 | Number of Questions In Headings Size | -0.19 | 7 | 2 | 24 % | 82 % |
| 7 | Inline CSS Kilobytes Size | -0.18 | 205 | 58 | 53 % | 83 % |
| 8 | Page Size Kilobytes Size | -0.18 | 994 | 319 | 67 % | 67 % |
| 9 | Search Result Domain Length Size | -0.18 | 23 | 16 | 69 % | 78 % |
| 10 | Search Result Host Length Size | -0.18 | 23 | 16 | 69 % | 78 % |
| 11 | Number of Questions Size | -0.17 | 62 | 12 | 50 % | 74 % |
| 12 | Word Count in Meta Description Size | -0.17 | 38 | 18 | 51 % | 73 % |
| 13 | Inline JavaScript Kilobytes Size | -0.17 | 561 | 132 | 63 % | 68 % |
| 14 | Search Result URL Length Size | -0.16 | 94 | 66 | 82 % | 59 % |
| 15 | Meta Description Length Size | -0.16 | 238 | 110 | 51 % | 74 % |
| 16 | Title Length Size | -0.16 | 157 | 52 | 67 % | 74 % |
| 17 | Title Word Count Size | -0.16 | 25 | 8 | 67 % | 74 % |
| 18 | Number of Prices Size | -0.16 | 3738 | 128 | 55 % | 79 % |
| 19 | Number of Questions In H2 Tags Size | -0.16 | 4 | 1 | 16 % | 81 % |
| 20 | Search Result Summary Length Size | -0.16 | 161 | 148 | 81 % | 77 % |
| 21 | Number of Questions In H3 Tags Size | -0.15 | 5 | 1 | 12 % | 79 % |
| 22 | Search Result Link Text Length Size | -0.11 | 54 | 44 | 81 % | 51 % |
| 23 | Number of Questions In H4 Tags Size | -0.1 | 3 | 1 | 3 % | 70 % |
| 24 | Bytes To First P Tag Size | -0.09 | 90437 | 69619 | 79 % | 35 % |
| 25 | Number of Bytes to First Match Size | -0.09 | 9938495 | 1370209 | 78 % | 37 % |
| 26 | Number of Questions In H1 Tags Size | -0.08 | 1 | 1 | 3 % | 68 % |
| 27 | Number of Questions In H5 Tags Size | -0.05 | 1 | 1 | 1 % | 70 % |
| 28 | Number of Questions In H6 Tags Size | -0.02 | 1 | 0 | 0 % | 72 % |
| 29 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 77 % |
| 30 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 77 % |
| 31 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 77 % |
| 32 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 77 % |
| 33 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 77 % |
| 34 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 93 % |
| 35 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 93 % |
| 36 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 96 % |