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 Images Size | -0.24 | 81 | 27 | 60 % | 88 % |
| 2 | Number of Images with ALT Text Size | -0.23 | 67 | 19 | 56 % | 89 % |
| 3 | Number of P Tags Size | -0.23 | 123 | 40 | 59 % | 87 % |
| 4 | Unabridged Word Count Size | -0.23 | 12848 | 1903 | 74 % | 90 % |
| 5 | Word Count Size | -0.23 | 10144 | 1550 | 74 % | 90 % |
| 6 | Number of Heading Tags Size | -0.22 | 49 | 21 | 61 % | 89 % |
| 7 | Clean Text Kilobytes Size | -0.22 | 82 | 13 | 60 % | 91 % |
| 8 | Number of H1 Tags Size | -0.22 | 4 | 1 | 57 % | 83 % |
| 9 | Number of H2 Tags Size | -0.22 | 14 | 7 | 56 % | 85 % |
| 10 | Number of HTML Tags Size | -0.22 | 2216 | 927 | 73 % | 86 % |
| 11 | Average Words Per Sentence Size | -0.21 | 242 | 25 | 63 % | 79 % |
| 12 | Number of HTML Comments Size | -0.2 | 492 | 63 | 56 % | 84 % |
| 13 | Number of H3 Tags Size | -0.2 | 33 | 9 | 48 % | 89 % |
| 14 | Number of Images without ALT Text Size | -0.19 | 29 | 8 | 43 % | 86 % |
| 15 | Search Result Host Length Size | -0.19 | 22 | 16 | 72 % | 74 % |
| 16 | Search Result Domain Length Size | -0.19 | 22 | 16 | 72 % | 74 % |
| 17 | Number of Questions In Headings Size | -0.18 | 9 | 3 | 33 % | 84 % |
| 18 | Page Size Kilobytes Size | -0.18 | 788 | 292 | 72 % | 58 % |
| 19 | Number of Sentences Size | -0.17 | 541 | 141 | 71 % | 85 % |
| 20 | Search Result Summary Length Size | -0.17 | 216 | 149 | 85 % | 67 % |
| 21 | Inline CSS Kilobytes Size | -0.17 | 154 | 55 | 56 % | 83 % |
| 22 | Number of Questions In H3 Tags Size | -0.17 | 5 | 2 | 18 % | 79 % |
| 23 | Inline JavaScript Kilobytes Size | -0.16 | 557 | 117 | 67 % | 52 % |
| 24 | Title Length Size | -0.16 | 129 | 51 | 70 % | 56 % |
| 25 | Title Word Count Size | -0.16 | 17 | 8 | 71 % | 61 % |
| 26 | Number of H4 Tags Size | -0.15 | 12 | 3 | 26 % | 82 % |
| 27 | Number of Prices Size | -0.15 | 484 | 115 | 59 % | 78 % |
| 28 | Number of Questions Size | -0.15 | 55 | 14 | 59 % | 73 % |
| 29 | Number of Questions In H2 Tags Size | -0.15 | 4 | 1 | 21 % | 82 % |
| 30 | Word Count in Meta Description Size | -0.14 | 54 | 19 | 60 % | 62 % |
| 31 | Meta Description Length Size | -0.14 | 394 | 115 | 60 % | 61 % |
| 32 | Search Result URL Length Size | -0.13 | 110 | 66 | 86 % | 43 % |
| 33 | Number of HREF Lang Tags Size | -0.13 | 26 | 2 | 9 % | 80 % |
| 34 | Number of H5 Tags Size | -0.13 | 10 | 2 | 12 % | 82 % |
| 35 | Number of H6 Tags Size | -0.1 | 6 | 1 | 7 % | 74 % |
| 36 | Number of Bytes to First Match Size | -0.1 | 9857317 | 1755986 | 87 % | 42 % |
| 37 | Search Result Link Text Length Size | -0.1 | 59 | 48 | 86 % | 37 % |
| 38 | Bytes To First P Tag Size | -0.1 | 93716 | 71654 | 90 % | 36 % |
| 39 | Number of Questions In H4 Tags Size | -0.09 | 2 | 1 | 4 % | 70 % |
| 40 | Number of Schema Products Size | -0.06 | 5 | 1 | 3 % | 74 % |
| 41 | Number of Questions In H1 Tags Size | -0.06 | 1 | 1 | 3 % | 66 % |
| 42 | Number of Questions In H5 Tags Size | -0.06 | 1 | 1 | 1 % | 76 % |
| 43 | Number of Questions In H6 Tags Size | -0.02 | 2 | 0 | 0 % | 74 % |
| 44 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 80 % |
| 45 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 80 % |
| 46 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 80 % |
| 47 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 80 % |
| 48 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 80 % |
| 49 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 97 % |
| 50 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 97 % |
| 51 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 97 % |
