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 | -0.21 | 134 | 12 | 88 % | 79 % |
| 2 | Unabridged Word Count Size | -0.21 | 27434 | 1947 | 92 % | 73 % |
| 3 | Word Count Size | -0.21 | 7018 | 1442 | 92 % | 73 % |
| 4 | Number of HTML Tags Size | -0.19 | 2969 | 1046 | 92 % | 72 % |
| 5 | Number of Sentences Size | -0.19 | 1072 | 104 | 90 % | 73 % |
| 6 | Number of P Tags Size | -0.18 | 970 | 38 | 87 % | 73 % |
| 7 | Number of Questions Size | -0.18 | 139 | 10 | 68 % | 76 % |
| 8 | Number of Heading Tags Size | -0.18 | 129 | 21 | 88 % | 72 % |
| 9 | Number of Images with ALT Text Size | -0.18 | 295 | 22 | 82 % | 76 % |
| 10 | Number of Images Size | -0.17 | 307 | 32 | 88 % | 71 % |
| 11 | Page Size Kilobytes Size | -0.17 | 733 | 226 | 92 % | 75 % |
| 12 | Number of Questions In Headings Size | -0.16 | 12 | 2 | 37 % | 69 % |
| 13 | Number of H2 Tags Size | -0.16 | 18 | 7 | 76 % | 71 % |
| 14 | Number of H3 Tags Size | -0.15 | 26 | 8 | 67 % | 70 % |
| 15 | Inline JavaScript Kilobytes Size | -0.15 | 448 | 63 | 89 % | 70 % |
| 16 | Number of Questions In H2 Tags Size | -0.15 | 5 | 1 | 22 % | 69 % |
| 17 | Number of Prices Size | -0.14 | 1936 | 59 | 73 % | 68 % |
| 18 | Number of HTML Comments Size | -0.14 | 719 | 36 | 78 % | 63 % |
| 19 | Number of HREF Lang Tags Size | -0.13 | 19 | 2 | 11 % | 66 % |
| 20 | Inline CSS Kilobytes Size | -0.13 | 155 | 49 | 66 % | 68 % |
| 21 | Number of Images without ALT Text Size | -0.13 | 166 | 11 | 68 % | 67 % |
| 22 | Number of Questions In H3 Tags Size | -0.13 | 7 | 1 | 16 % | 67 % |
| 23 | Average Words Per Sentence Size | -0.13 | 285 | 38 | 89 % | 58 % |
| 24 | Number of H4 Tags Size | -0.12 | 115 | 4 | 44 % | 65 % |
| 25 | Title Word Count Size | -0.12 | 19 | 9 | 90 % | 56 % |
| 26 | Search Result Domain Length Size | -0.12 | 28 | 18 | 92 % | 56 % |
| 27 | Search Result Host Length Size | -0.12 | 28 | 18 | 92 % | 54 % |
| 28 | Word Count in Meta Description Size | -0.12 | 236 | 20 | 70 % | 61 % |
| 29 | Meta Description Length Size | -0.12 | 1304 | 123 | 70 % | 61 % |
| 30 | Title Length Size | -0.11 | 158 | 55 | 90 % | 52 % |
| 31 | Number of H1 Tags Size | -0.11 | 10 | 2 | 81 % | 62 % |
| 32 | Search Result URL Length Size | -0.11 | 230 | 62 | 98 % | 37 % |
| 33 | Number of H5 Tags Size | -0.11 | 53 | 2 | 20 % | 62 % |
| 34 | Search Result Summary Length Size | -0.11 | 167 | 147 | 95 % | 48 % |
| 35 | Number of Questions In H4 Tags Size | -0.1 | 5 | 1 | 6 % | 60 % |
| 36 | Number of H6 Tags Size | -0.1 | 8 | 1 | 10 % | 58 % |
| 37 | Search Result Link Text Length Size | -0.1 | 57 | 48 | 98 % | 45 % |
| 38 | Bytes To First P Tag Size | -0.09 | 89040 | 61497 | 98 % | 50 % |
| 39 | Number of Questions In H1 Tags Size | -0.09 | 1 | 1 | 6 % | 48 % |
| 40 | Number of Bytes to First Match Size | -0.08 | 9931977 | 808289 | 98 % | 44 % |
| 41 | Number of Schema Products Size | -0.07 | 11 | 1 | 4 % | 59 % |
| 42 | Number of Questions In H5 Tags Size | -0.07 | 1 | 1 | 2 % | 55 % |
| 43 | Number of Questions In H6 Tags Size | -0.04 | 1 | 0 | 1 % | 52 % |
| 44 | Body Tag Size Kilobytes Size | -0.02 | 261 | 11 | 7 % | 78 % |
| 45 | Head Size Kilobytes Size | -0.01 | 99 | 3 | 6 % | 78 % |
| 46 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 55 % |
| 47 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 55 % |
| 48 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 55 % |
| 49 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 55 % |
| 50 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 55 % |
| 51 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 78 % |
