| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| pnas article processing charge | 0.97 | 0.5 | 4436 | 55 | 30 |
| pnas | 0.99 | 0.3 | 7051 | 93 | 4 |
| article | 1.93 | 0.5 | 6357 | 69 | 7 |
| processing | 1.67 | 0.4 | 2599 | 43 | 10 |
| charge | 1.26 | 0.3 | 2673 | 22 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| pnas article processing charge | 0.86 | 0.4 | 1594 | 49 |
