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 | 242 | 12 | 69 % | 88 % |
| 2 | Unabridged Word Count Size | -0.18 | 26444 | 1832 | 83 % | 86 % |
| 3 | Number of P Tags Size | -0.18 | 109 | 35 | 69 % | 84 % |
| 4 | Word Count Size | -0.18 | 19186 | 1387 | 83 % | 86 % |
| 5 | Number of H2 Tags Size | -0.18 | 21 | 7 | 64 % | 82 % |
| 6 | Number of Heading Tags Size | -0.18 | 117 | 19 | 70 % | 82 % |
| 7 | Number of Images Size | -0.18 | 136 | 24 | 70 % | 85 % |
| 8 | Number of H1 Tags Size | -0.18 | 4 | 1 | 66 % | 84 % |
| 9 | Number of Images with ALT Text Size | -0.17 | 122 | 16 | 64 % | 88 % |
| 10 | Number of HTML Tags Size | -0.17 | 22148 | 959 | 84 % | 85 % |
| 11 | Average Words Per Sentence Size | -0.16 | 972 | 30 | 75 % | 85 % |
| 12 | Number of H3 Tags Size | -0.15 | 38 | 8 | 54 % | 81 % |
| 13 | Number of Images without ALT Text Size | -0.15 | 46 | 8 | 50 % | 84 % |
| 14 | Number of HTML Comments Size | -0.15 | 732 | 49 | 67 % | 84 % |
| 15 | Number of Sentences Size | -0.14 | 865 | 141 | 81 % | 77 % |
| 16 | Number of Questions In Headings Size | -0.14 | 12 | 2 | 36 % | 82 % |
| 17 | Search Result Host Length Size | -0.14 | 25 | 17 | 84 % | 71 % |
| 18 | Number of Questions In H2 Tags Size | -0.14 | 11 | 1 | 23 % | 77 % |
| 19 | Search Result Domain Length Size | -0.13 | 25 | 17 | 84 % | 74 % |
| 20 | Search Result Summary Length Size | -0.13 | 160 | 151 | 94 % | 73 % |
| 21 | Inline CSS Kilobytes Size | -0.13 | 224 | 61 | 65 % | 81 % |
| 22 | Number of Questions Size | -0.13 | 101 | 15 | 67 % | 69 % |
| 23 | Number of H4 Tags Size | -0.13 | 46 | 3 | 31 % | 76 % |
| 24 | Number of HREF Lang Tags Size | -0.12 | 24 | 2 | 11 % | 79 % |
| 25 | Page Size Kilobytes Size | -0.12 | 1096 | 320 | 82 % | 64 % |
| 26 | Number of Prices Size | -0.12 | 755 | 95 | 66 % | 78 % |
| 27 | Word Count in Meta Description Size | -0.12 | 79 | 20 | 65 % | 68 % |
| 28 | Number of Questions In H3 Tags Size | -0.11 | 5 | 1 | 17 % | 79 % |
| 29 | Meta Description Length Size | -0.11 | 470 | 122 | 65 % | 71 % |
| 30 | Number of H5 Tags Size | -0.11 | 37 | 2 | 14 % | 74 % |
| 31 | Title Word Count Size | -0.11 | 23 | 8 | 82 % | 68 % |
| 32 | Search Result URL Length Size | -0.11 | 110 | 64 | 94 % | 59 % |
| 33 | Title Length Size | -0.11 | 159 | 53 | 82 % | 69 % |
| 34 | Inline JavaScript Kilobytes Size | -0.11 | 633 | 134 | 78 % | 61 % |
| 35 | Number of H6 Tags Size | -0.1 | 35 | 1 | 8 % | 71 % |
| 36 | Search Result Link Text Length Size | -0.1 | 55 | 45 | 94 % | 49 % |
| 37 | Number of Questions In H4 Tags Size | -0.09 | 3 | 1 | 5 % | 72 % |
| 38 | Number of Questions In H1 Tags Size | -0.07 | 1 | 1 | 5 % | 71 % |
| 39 | Number of Bytes to First Match Size | -0.07 | 9972443 | 1403524 | 93 % | 44 % |
| 40 | Number of Questions In H5 Tags Size | -0.06 | 3 | 1 | 2 % | 72 % |
| 41 | Bytes To First P Tag Size | -0.05 | 92170 | 71047 | 94 % | 39 % |
| 42 | Number of Schema Products Size | -0.05 | 4 | 1 | 2 % | 70 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 7 | 0 | 0 % | 72 % |
| 44 | Body Tag Size Kilobytes Size | -0 | 67 | 0 | 0 % | 94 % |
| 45 | Head Size Kilobytes Size | -0 | 38 | 0 | 0 % | 95 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 78 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 78 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 78 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 78 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 78 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 94 % |
