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 | -0.18 | 4223 | 1436 | 81 % | 89 % |
| 2 | Unabridged Word Count Size | -0.18 | 8545 | 2056 | 81 % | 89 % |
| 3 | Clean Text Kilobytes Size | -0.18 | 49 | 14 | 66 % | 88 % |
| 4 | Number of Questions In Headings Size | -0.16 | 10 | 2 | 32 % | 82 % |
| 5 | Number of Sentences Size | -0.16 | 660 | 139 | 77 % | 82 % |
| 6 | Average Words Per Sentence Size | -0.16 | 149 | 31 | 71 % | 83 % |
| 7 | Search Result Domain Length Size | -0.15 | 23 | 16 | 81 % | 84 % |
| 8 | Search Result Host Length Size | -0.15 | 23 | 16 | 81 % | 84 % |
| 9 | Title Word Count Size | -0.15 | 18 | 8 | 78 % | 77 % |
| 10 | Title Length Size | -0.15 | 107 | 52 | 79 % | 76 % |
| 11 | Word Count in Meta Description Size | -0.15 | 39 | 19 | 62 % | 77 % |
| 12 | Meta Description Length Size | -0.15 | 207 | 118 | 63 % | 76 % |
| 13 | Page Size Kilobytes Size | -0.14 | 1037 | 349 | 79 % | 68 % |
| 14 | Number of Questions Size | -0.14 | 65 | 12 | 63 % | 78 % |
| 15 | Inline CSS Kilobytes Size | -0.14 | 207 | 56 | 62 % | 85 % |
| 16 | Number of Questions In H2 Tags Size | -0.14 | 4 | 1 | 20 % | 80 % |
| 17 | Number of Prices Size | -0.13 | 391 | 103 | 65 % | 79 % |
| 18 | Inline JavaScript Kilobytes Size | -0.13 | 524 | 164 | 75 % | 69 % |
| 19 | Number of Questions In H3 Tags Size | -0.13 | 7 | 1 | 16 % | 78 % |
| 20 | Search Result URL Length Size | -0.12 | 94 | 64 | 95 % | 59 % |
| 21 | Search Result Summary Length Size | -0.12 | 163 | 152 | 95 % | 70 % |
| 22 | Search Result Link Text Length Size | -0.1 | 56 | 46 | 94 % | 45 % |
| 23 | Number of Questions In H4 Tags Size | -0.09 | 4 | 1 | 4 % | 72 % |
| 24 | Number of Questions In H1 Tags Size | -0.07 | 1 | 1 | 4 % | 71 % |
| 25 | Number of Bytes to First Match Size | -0.06 | 9408990 | 1628981 | 96 % | 31 % |
| 26 | Bytes To First P Tag Size | -0.06 | 93915 | 73628 | 95 % | 38 % |
| 27 | Number of Questions In H5 Tags Size | -0.04 | 1 | 1 | 1 % | 69 % |
| 28 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 0 % | 77 % |
| 29 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 82 % |
| 30 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 82 % |
| 31 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 82 % |
| 32 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 82 % |
| 33 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 82 % |
| 34 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 98 % |
| 35 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 98 % |
| 36 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 99 % |
