The amount of stake that pool owner(s) contribute to their pool. Pools with higher pledge amounts earn more rewards for themselves and their delegators.
Pledge is skin in the game. Pools that pledge more are proving to their delegators that they care deeply about Cardano.
WILD will have a minimum healthy pledge of 250,000 ADA. Further, WILD will grow organically from pledge rewards. The pledged & organic ADA will remain, in the WILD pool, for not less than three years from the first block created, stamped epoch 256.
No, bait-and-switch, we do not trade against our delegators!