Top SEO Factor data is updated daily for latest "month to date" measurements.
| Name | Correlation | #1 Max | Page 1 Avg | Usage % | Searches % | |
| 1 | Word Count Size | -0.17 | 4300 | 1529 | 79 % | 84 % |
| 2 | Unabridged Word Count Size | -0.17 | 5266 | 1950 | 79 % | 83 % |
| 3 | Number of HTML Tags Size | -0.17 | 2800 | 1150 | 79 % | 87 % |
| 4 | Page Size Kilobytes Size | -0.17 | 1061 | 285 | 79 % | 83 % |
| 5 | Number of P Tags Size | -0.17 | 132 | 41 | 75 % | 83 % |
| 6 | Number of Sentences Size | -0.17 | 558 | 127 | 77 % | 85 % |
| 7 | Clean Text Kilobytes Size | -0.17 | 44 | 13 | 75 % | 84 % |
| 8 | Number of Images Size | -0.17 | 130 | 33 | 75 % | 85 % |
| 9 | Number of Prices Size | -0.16 | 994 | 76 | 65 % | 84 % |
| 10 | Inline JavaScript Kilobytes Size | -0.16 | 508 | 80 | 76 % | 83 % |
| 11 | Number of Images with ALT Text Size | -0.16 | 100 | 23 | 71 % | 87 % |
| 12 | Inline CSS Kilobytes Size | -0.16 | 212 | 61 | 60 % | 80 % |
| 13 | Number of Questions Size | -0.16 | 54 | 11 | 63 % | 79 % |
| 14 | Number of Heading Tags Size | -0.16 | 56 | 23 | 75 % | 82 % |
| 15 | Search Result Host Length Size | -0.16 | 25 | 16 | 78 % | 77 % |
| 16 | Search Result Domain Length Size | -0.16 | 25 | 16 | 78 % | 77 % |
| 17 | Number of HTML Comments Size | -0.15 | 681 | 61 | 71 % | 82 % |
| 18 | Number of H2 Tags Size | -0.15 | 28 | 8 | 68 % | 82 % |
| 19 | Number of H1 Tags Size | -0.15 | 4 | 2 | 70 % | 86 % |
| 20 | Title Word Count Size | -0.15 | 13 | 7 | 77 % | 74 % |
| 21 | Title Length Size | -0.15 | 87 | 48 | 77 % | 76 % |
| 22 | Number of Images without ALT Text Size | -0.15 | 89 | 11 | 58 % | 84 % |
| 23 | Average Words Per Sentence Size | -0.14 | 275 | 34 | 76 % | 78 % |
| 24 | Number of H3 Tags Size | -0.14 | 35 | 9 | 60 % | 80 % |
| 25 | Number of Questions In Headings Size | -0.14 | 7 | 2 | 37 % | 78 % |
| 26 | Meta Description Length Size | -0.14 | 419 | 117 | 63 % | 77 % |
| 27 | Word Count in Meta Description Size | -0.14 | 65 | 19 | 63 % | 76 % |
| 28 | Number of H4 Tags Size | -0.13 | 23 | 4 | 38 % | 75 % |
| 29 | Number of Questions In H2 Tags Size | -0.13 | 4 | 1 | 23 % | 74 % |
| 30 | Search Result URL Length Size | -0.12 | 104 | 64 | 96 % | 57 % |
| 31 | Number of Questions In H3 Tags Size | -0.12 | 4 | 1 | 17 % | 73 % |
| 32 | Number of HREF Lang Tags Size | -0.12 | 20 | 2 | 13 % | 69 % |
| 33 | Number of H5 Tags Size | -0.11 | 7 | 2 | 18 % | 72 % |
| 34 | Number of H6 Tags Size | -0.1 | 7 | 1 | 10 % | 71 % |
| 35 | Search Result Link Text Length Size | -0.1 | 53 | 45 | 95 % | 52 % |
| 36 | Search Result Summary Length Size | -0.1 | 161 | 152 | 94 % | 55 % |
| 37 | Number of Questions In H4 Tags Size | -0.09 | 2 | 1 | 5 % | 68 % |
| 38 | Bytes To First P Tag Size | -0.09 | 89231 | 70144 | 96 % | 41 % |
| 39 | Number of Schema Products Size | -0.08 | 11 | 1 | 4 % | 74 % |
| 40 | Number of Bytes to First Match Size | -0.08 | 9806845 | 1360945 | 95 % | 32 % |
| 41 | Number of Questions In H1 Tags Size | -0.07 | 1 | 1 | 4 % | 60 % |
| 42 | Number of Questions In H5 Tags Size | -0.07 | 1 | 1 | 2 % | 64 % |
| 43 | Number of Questions In H6 Tags Size | -0.03 | 1 | 0 | 1 % | 69 % |
| 44 | Ahrefs Has HTML Pages Size | 0 | 0 | 0 | 0 % | 76 % |
| 45 | Ahrefs HTML Pages Size | 0 | 0 | 0 | 0 % | 76 % |
| 46 | Ahrefs Pages Size | 0 | 0 | 0 | 0 % | 76 % |
| 47 | Ahrefs Page Size Size | 0 | 0 | 0 | 0 % | 76 % |
| 48 | Ahrefs Word Count Size | 0 | 0 | 0 | 0 % | 76 % |
| 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 % |
