| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| not so famous serial killers | 0.92 | 0.9 | 2024 | 23 |
| not known serial killers | 1.09 | 0.6 | 8383 | 6 |
| famous serial killers not caught | 0.37 | 0.5 | 6902 | 73 |
| list of not well known serial killers | 0.75 | 1 | 1958 | 9 |
| least famous serial killers | 0.31 | 1 | 2631 | 77 |
| serial killers most famous | 1.24 | 1 | 9984 | 73 |
| top famous serial killers | 1.09 | 0.2 | 8566 | 42 |
| serial killers that have not been caught | 1.43 | 0.2 | 9393 | 5 |
| lesser known serial killers | 0.1 | 0.3 | 9126 | 68 |
| serial killers you never heard of | 1.91 | 0.2 | 4067 | 27 |
| most notable serial killers | 0.89 | 0.4 | 4210 | 98 |
