"How is this possible and what does it mean?"

Triple yield means accumulating three forms of yield on your funds. This is made possible when you lend out your funds via Kashi.

How?

1. Lend out your funds via Kashi and earn interest from borrowers.
2. Idle assets automatically earn a small yield from Bentobox strategies.
3. Stake the KMP tokens you receive in Kashi farms to earn extra $SUSHI rewards.

When Trident releases, it will be possible to do the same with your SLPs

1. Add liquidity on Trident and earn fees from all swaps.
2. Idle assets automatically earn a small yield from Bentobox strategies.
3. Stake the SLP tokens you receive in Sushiswap farms to earn extra $SUSHI rewards.