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 HTML Tags Size | -0.17 | 2990 | 1051 | 83 % | 84 % |
| 2 | Unabridged Word Count Size | -0.17 | 10134 | 1931 | 82 % | 84 % |
| 3 | Word Count Size | -0.17 | 7088 | 1557 | 82 % | 84 % |
| 4 | Number of Sentences Size | -0.17 | 1419 | 122 | 81 % | 87 % |
| 5 | Clean Text Kilobytes Size | -0.17 | 78 | 13 | 77 % | 85 % |
| 6 | Number of Heading Tags Size | -0.16 | 287 | 21 | 76 % | 86 % |
| 7 | Number of P Tags Size | -0.16 | 929 | 39 | 75 % | 84 % |
| 8 | Number of Images Size | -0.16 | 255 | 30 | 77 % | 82 % |
| 9 | Number of Images with ALT Text Size | -0.16 | 220 | 21 | 72 % | 84 % |
| 10 | Number of H2 Tags Size | -0.16 | 22 | 7 | 67 % | 85 % |
| 11 | Number of Questions Size | -0.15 | 182 | 11 | 63 % | 86 % |
| 12 | Page Size Kilobytes Size | -0.15 | 1478 | 260 | 82 % | 84 % |
| 13 | Search Result Host Length Size | -0.15 | 28 | 18 | 80 % | 71 % |
| 14 | Search Result Domain Length Size | -0.15 | 28 | 18 | 80 % | 72 % |
| 15 | Number of H3 Tags Size | -0.15 | 34 | 8 | 60 % | 83 % |
| 16 | Number of Questions In Headings Size | -0.15 | 11 | 2 | 34 % | 82 % |
| 17 | Number of H1 Tags Size | -0.14 | 27 | 2 | 70 % | 82 % |
| 18 | Inline CSS Kilobytes Size | -0.14 | 227 | 54 | 60 % | 81 % |
| 19 | Number of HTML Comments Size | -0.14 | 458 | 43 | 69 % | 81 % |
| 20 | Inline JavaScript Kilobytes Size | -0.14 | 1331 | 83 | 79 % | 81 % |
| 21 | Number of Prices Size | -0.13 | 724 | 59 | 66 % | 81 % |
| 22 | Number of Questions In H2 Tags Size | -0.13 | 4 | 1 | 21 % | 76 % |
| 23 | Number of Questions In H3 Tags Size | -0.13 | 8 | 1 | 15 % | 78 % |
| 24 | Number of H4 Tags Size | -0.13 | 39 | 4 | 37 % | 74 % |
| 25 | Number of Images without ALT Text Size | -0.13 | 111 | 10 | 59 % | 80 % |
| 26 | Meta Description Length Size | -0.13 | 7119 | 123 | 65 % | 74 % |
| 27 | Title Word Count Size | -0.13 | 22 | 8 | 79 % | 73 % |
| 28 | Title Length Size | -0.13 | 100 | 52 | 79 % | 72 % |
| 29 | Average Words Per Sentence Size | -0.13 | 872 | 49 | 77 % | 75 % |
| 30 | Word Count in Meta Description Size | -0.13 | 103 | 20 | 65 % | 73 % |
| 31 | Search Result Summary Length Size | -0.12 | 190 | 150 | 87 % | 67 % |
| 32 | Search Result Link Text Length Size | -0.12 | 56 | 44 | 87 % | 55 % |
| 33 | Search Result URL Length Size | -0.12 | 133 | 63 | 88 % | 47 % |
| 34 | Number of H5 Tags Size | -0.11 | 19 | 2 | 19 % | 67 % |
| 35 | Number of H6 Tags Size | -0.11 | 16 | 1 | 10 % | 68 % |
| 36 | Number of Questions In H4 Tags Size | -0.11 | 2 | 1 | 5 % | 67 % |
| 37 | Number of HREF Lang Tags Size | -0.1 | 29 | 2 | 10 % | 71 % |
| 38 | Bytes To First P Tag Size | -0.09 | 92357 | 67418 | 92 % | 50 % |
| 39 | Number of Questions In H1 Tags Size | -0.07 | 1 | 1 | 4 % | 59 % |
| 40 | Number of Bytes to First Match Size | -0.07 | 9716665 | 1091247 | 94 % | 37 % |
| 41 | Number of Questions In H5 Tags Size | -0.06 | 1 | 1 | 2 % | 60 % |
| 42 | Number of Schema Products Size | -0.06 | 8 | 1 | 3 % | 66 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 1 % | 62 % |
| 44 | Body Tag Size Kilobytes Size | -0 | 172 | 1 | 1 % | 95 % |
| 45 | Head Size Kilobytes Size | -0 | 88 | 0 | 1 % | 95 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 71 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 71 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 71 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 71 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 71 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 95 % |
