The simple definition
If a slot counts 100% toward wagering, every 10 units staked adds 10 units toward the target. If a table game counts 10%, that same 10-unit stake adds only 1 unit toward the target.
Quick comparison
| Game type | Stake | Weighting | Counts toward wagering |
|---|---|---|---|
| Slot | 20 units | 100% | 20 units |
| Roulette | 20 units | 10% | 2 units |
Why this changes bonus value
A bonus can look attractive on the surface but become much harder to clear if the games you actually want to play contribute only partly. That is why game weighting belongs right next to wagering requirements, RTP, and max cashout in the main group of casino bonus terms.