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 | -0.18 | 6126 | 1105 | 81 % | 86 % |
| 2 | Unabridged Word Count Size | -0.17 | 11084 | 1961 | 81 % | 87 % |
| 3 | Word Count Size | -0.17 | 9175 | 1569 | 81 % | 86 % |
| 4 | Number of Sentences Size | -0.17 | 693 | 131 | 80 % | 85 % |
| 5 | Clean Text Kilobytes Size | -0.17 | 81 | 13 | 76 % | 87 % |
| 6 | Number of Images Size | -0.17 | 409 | 35 | 77 % | 85 % |
| 7 | Page Size Kilobytes Size | -0.17 | 1255 | 275 | 80 % | 85 % |
| 8 | Number of Images with ALT Text Size | -0.17 | 398 | 24 | 72 % | 86 % |
| 9 | Number of P Tags Size | -0.17 | 251 | 42 | 76 % | 84 % |
| 10 | Inline JavaScript Kilobytes Size | -0.16 | 640 | 80 | 77 % | 82 % |
| 11 | Number of Heading Tags Size | -0.16 | 273 | 23 | 77 % | 84 % |
| 12 | Number of Questions Size | -0.16 | 55 | 11 | 65 % | 83 % |
| 13 | Number of H2 Tags Size | -0.15 | 17 | 8 | 69 % | 83 % |
| 14 | Number of H1 Tags Size | -0.15 | 20 | 2 | 71 % | 81 % |
| 15 | Inline CSS Kilobytes Size | -0.15 | 178 | 63 | 62 % | 85 % |
| 16 | Number of Prices Size | -0.15 | 768 | 70 | 65 % | 85 % |
| 17 | Average Words Per Sentence Size | -0.15 | 401 | 32 | 78 % | 76 % |
| 18 | Search Result Host Length Size | -0.15 | 25 | 16 | 80 % | 77 % |
| 19 | Search Result Domain Length Size | -0.15 | 25 | 16 | 80 % | 77 % |
| 20 | Number of Images without ALT Text Size | -0.15 | 100 | 11 | 58 % | 81 % |
| 21 | Number of Questions In Headings Size | -0.15 | 16 | 2 | 38 % | 82 % |
| 22 | Number of HTML Comments Size | -0.15 | 531 | 50 | 72 % | 81 % |
| 23 | Number of H3 Tags Size | -0.15 | 150 | 9 | 61 % | 82 % |
| 24 | Title Word Count Size | -0.14 | 34 | 8 | 78 % | 72 % |
| 25 | Title Length Size | -0.14 | 237 | 49 | 79 % | 73 % |
| 26 | Word Count in Meta Description Size | -0.14 | 87 | 19 | 64 % | 76 % |
| 27 | Meta Description Length Size | -0.14 | 573 | 118 | 65 % | 77 % |
| 28 | Number of Questions In H2 Tags Size | -0.13 | 5 | 1 | 25 % | 78 % |
| 29 | Number of Questions In H3 Tags Size | -0.13 | 12 | 1 | 18 % | 76 % |
| 30 | Number of H4 Tags Size | -0.13 | 110 | 4 | 36 % | 75 % |
| 31 | Search Result URL Length Size | -0.13 | 96 | 63 | 95 % | 53 % |
| 32 | Number of HREF Lang Tags Size | -0.12 | 22 | 2 | 13 % | 72 % |
| 33 | Number of H5 Tags Size | -0.12 | 25 | 2 | 17 % | 74 % |
| 34 | Search Result Summary Length Size | -0.1 | 167 | 152 | 92 % | 49 % |
| 35 | Number of H6 Tags Size | -0.1 | 9 | 1 | 10 % | 67 % |
| 36 | Number of Questions In H4 Tags Size | -0.1 | 3 | 1 | 5 % | 67 % |
| 37 | Search Result Link Text Length Size | -0.1 | 59 | 45 | 95 % | 51 % |
| 38 | Bytes To First P Tag Size | -0.08 | 91322 | 68974 | 95 % | 45 % |
| 39 | Number of Bytes to First Match Size | -0.08 | 9428707 | 1243530 | 95 % | 29 % |
| 40 | Number of Questions In H1 Tags Size | -0.08 | 1 | 1 | 5 % | 65 % |
| 41 | Number of Schema Products Size | -0.07 | 8 | 1 | 3 % | 69 % |
| 42 | Number of Questions In H5 Tags Size | -0.06 | 1 | 1 | 2 % | 66 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 1 % | 70 % |
| 44 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 81 % |
| 45 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 81 % |
| 46 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 81 % |
| 47 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 81 % |
| 48 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 81 % |
| 49 | Bing Page Count Size | 0 | 0 | 0 | 0 % | 96 % |
| 50 | Body Tag Size Kilobytes Size | 0 | 0 | 0 | 0 % | 96 % |
| 51 | Head Size Kilobytes Size | 0 | 0 | 0 | 0 % | 96 % |