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 P Tags Size | -0.2 | 218 | 32 | 62 % | 90 % |
| 2 | Number of Heading Tags Size | -0.2 | 50 | 17 | 64 % | 86 % |
| 3 | Word Count Size | -0.2 | 12278 | 1319 | 77 % | 88 % |
| 4 | Unabridged Word Count Size | -0.19 | 56122 | 2145 | 77 % | 87 % |
| 5 | Clean Text Kilobytes Size | -0.19 | 284 | 14 | 63 % | 85 % |
| 6 | Number of H2 Tags Size | -0.19 | 18 | 6 | 55 % | 82 % |
| 7 | Number of H1 Tags Size | -0.19 | 2 | 1 | 58 % | 85 % |
| 8 | Number of Images Size | -0.18 | 165 | 23 | 64 % | 86 % |
| 9 | Number of HTML Tags Size | -0.18 | 4172 | 928 | 78 % | 87 % |
| 10 | Number of Images with ALT Text Size | -0.18 | 85 | 15 | 58 % | 87 % |
| 11 | Number of HTML Comments Size | -0.17 | 257 | 46 | 61 % | 84 % |
| 12 | Number of Sentences Size | -0.17 | 697 | 121 | 74 % | 86 % |
| 13 | Number of H3 Tags Size | -0.17 | 37 | 7 | 46 % | 89 % |
| 14 | Average Words Per Sentence Size | -0.17 | 287 | 33 | 68 % | 84 % |
| 15 | Inline CSS Kilobytes Size | -0.17 | 133 | 56 | 58 % | 83 % |
| 16 | Number of Questions In Headings Size | -0.17 | 6 | 2 | 25 % | 83 % |
| 17 | Number of Images without ALT Text Size | -0.17 | 113 | 8 | 47 % | 84 % |
| 18 | Page Size Kilobytes Size | -0.16 | 854 | 307 | 75 % | 71 % |
| 19 | Search Result Domain Length Size | -0.16 | 21 | 16 | 77 % | 80 % |
| 20 | Search Result Host Length Size | -0.16 | 21 | 16 | 77 % | 80 % |
| 21 | Number of Questions Size | -0.16 | 62 | 10 | 53 % | 77 % |
| 22 | Title Length Size | -0.15 | 107 | 49 | 73 % | 80 % |
| 23 | Word Count in Meta Description Size | -0.15 | 36 | 17 | 53 % | 79 % |
| 24 | Meta Description Length Size | -0.15 | 238 | 106 | 54 % | 79 % |
| 25 | Title Word Count Size | -0.15 | 16 | 8 | 73 % | 80 % |
| 26 | Inline JavaScript Kilobytes Size | -0.15 | 561 | 134 | 70 % | 76 % |
| 27 | Search Result Summary Length Size | -0.14 | 161 | 150 | 90 % | 77 % |
| 28 | Number of Questions In H2 Tags Size | -0.14 | 4 | 1 | 16 % | 80 % |
| 29 | Number of H4 Tags Size | -0.14 | 10 | 3 | 28 % | 82 % |
| 30 | Number of Prices Size | -0.14 | 3738 | 125 | 59 % | 76 % |
| 31 | Number of HREF Lang Tags Size | -0.13 | 15 | 2 | 10 % | 78 % |
| 32 | Number of Questions In H3 Tags Size | -0.13 | 3 | 1 | 12 % | 81 % |
| 33 | Search Result URL Length Size | -0.12 | 88 | 67 | 93 % | 57 % |
| 34 | Number of H6 Tags Size | -0.12 | 15 | 1 | 7 % | 70 % |
| 35 | Number of H5 Tags Size | -0.11 | 6 | 1 | 13 % | 71 % |
| 36 | Search Result Link Text Length Size | -0.11 | 52 | 43 | 91 % | 54 % |
| 37 | Number of Questions In H4 Tags Size | -0.09 | 1 | 1 | 3 % | 71 % |
| 38 | Number of Questions In H1 Tags Size | -0.08 | 1 | 1 | 4 % | 69 % |
| 39 | Bytes To First P Tag Size | -0.08 | 90437 | 70632 | 91 % | 37 % |
| 40 | Number of Bytes to First Match Size | -0.07 | 6846732 | 1234134 | 89 % | 33 % |
| 41 | Number of Schema Products Size | -0.06 | 4 | 1 | 4 % | 65 % |
| 42 | Number of Questions In H5 Tags Size | -0.05 | 1 | 0 | 1 % | 71 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 0 % | 78 % |
| 44 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 83 % |
| 45 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 83 % |
| 46 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 83 % |
| 47 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 83 % |
| 48 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 83 % |
| 49 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 93 % |
| 50 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 93 % |
| 51 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 96 % |
