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 | -0.22 | 218 | 33 | 57 % | 88 % |
| 2 | Number of Heading Tags Size | -0.21 | 59 | 18 | 60 % | 84 % |
| 3 | Word Count Size | -0.21 | 12278 | 1329 | 73 % | 86 % |
| 4 | Clean Text Kilobytes Size | -0.21 | 284 | 13 | 58 % | 83 % |
| 5 | Unabridged Word Count Size | -0.21 | 56122 | 2080 | 73 % | 85 % |
| 6 | Number of H2 Tags Size | -0.2 | 29 | 6 | 51 % | 82 % |
| 7 | Number of Images Size | -0.2 | 165 | 24 | 59 % | 84 % |
| 8 | Number of H1 Tags Size | -0.19 | 2 | 1 | 54 % | 86 % |
| 9 | Number of HTML Tags Size | -0.19 | 4172 | 945 | 74 % | 86 % |
| 10 | Number of Images with ALT Text Size | -0.19 | 85 | 16 | 55 % | 85 % |
| 11 | Number of HTML Comments Size | -0.19 | 257 | 46 | 57 % | 82 % |
| 12 | Number of H3 Tags Size | -0.18 | 37 | 7 | 43 % | 86 % |
| 13 | Average Words Per Sentence Size | -0.18 | 287 | 32 | 62 % | 83 % |
| 14 | Number of Images without ALT Text Size | -0.18 | 113 | 9 | 43 % | 84 % |
| 15 | Number of Questions In Headings Size | -0.18 | 7 | 2 | 24 % | 82 % |
| 16 | Number of Sentences Size | -0.17 | 766 | 126 | 70 % | 84 % |
| 17 | Inline CSS Kilobytes Size | -0.17 | 193 | 57 | 56 % | 81 % |
| 18 | Search Result Domain Length Size | -0.17 | 22 | 16 | 73 % | 76 % |
| 19 | Search Result Host Length Size | -0.17 | 22 | 16 | 73 % | 76 % |
| 20 | Page Size Kilobytes Size | -0.17 | 994 | 317 | 71 % | 66 % |
| 21 | Number of Questions Size | -0.16 | 62 | 11 | 50 % | 74 % |
| 22 | Search Result Summary Length Size | -0.15 | 161 | 149 | 84 % | 76 % |
| 23 | Word Count in Meta Description Size | -0.15 | 36 | 18 | 51 % | 73 % |
| 24 | Title Length Size | -0.15 | 107 | 51 | 70 % | 75 % |
| 25 | Search Result URL Length Size | -0.15 | 90 | 66 | 85 % | 59 % |
| 26 | Inline JavaScript Kilobytes Size | -0.15 | 561 | 138 | 66 % | 70 % |
| 27 | Meta Description Length Size | -0.15 | 238 | 108 | 51 % | 73 % |
| 28 | Number of Questions In H2 Tags Size | -0.15 | 4 | 1 | 15 % | 79 % |
| 29 | Title Word Count Size | -0.15 | 16 | 8 | 70 % | 74 % |
| 30 | Number of H4 Tags Size | -0.15 | 31 | 3 | 26 % | 82 % |
| 31 | Number of Prices Size | -0.15 | 3738 | 127 | 57 % | 76 % |
| 32 | Number of Questions In H3 Tags Size | -0.14 | 5 | 1 | 11 % | 79 % |
| 33 | Number of HREF Lang Tags Size | -0.13 | 15 | 2 | 9 % | 77 % |
| 34 | Number of H6 Tags Size | -0.12 | 15 | 1 | 6 % | 71 % |
| 35 | Number of H5 Tags Size | -0.12 | 7 | 1 | 12 % | 75 % |
| 36 | Search Result Link Text Length Size | -0.11 | 54 | 43 | 83 % | 54 % |
| 37 | Bytes To First P Tag Size | -0.09 | 90437 | 70211 | 81 % | 35 % |
| 38 | Number of Questions In H4 Tags Size | -0.09 | 1 | 1 | 3 % | 69 % |
| 39 | Number of Bytes to First Match Size | -0.09 | 7621904 | 1224325 | 79 % | 35 % |
| 40 | Number of Questions In H1 Tags Size | -0.09 | 1 | 1 | 4 % | 66 % |
| 41 | Number of Schema Products Size | -0.07 | 6 | 1 | 3 % | 65 % |
| 42 | Number of Questions In H5 Tags Size | -0.05 | 1 | 0 | 1 % | 69 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 0 % | 73 % |
| 44 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 78 % |
| 45 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 78 % |
| 46 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 78 % |
| 47 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 78 % |
| 48 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 78 % |
| 49 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 92 % |
| 50 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 92 % |
| 51 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 96 % |