When an opportunity is marked as linked to other opportunities in the Merkl App, it means your deposits flow through multiple layers of contracts.
For instance, a vault in which you supply assets (child opportunity) may allocate part of its funds to a liquidity pool (parent opportunity) that earns rewards from Merkl campaigns. Thanks to Merkl forwarders, you receive rewards from the parent opportunity (in which you indirectly participate), in addition to the rewards from the child opportunity itself.
Supplying to a child opportunity may earn you higher rewards than supplying to the parent.
Parent and child rewards are not cumulative.
Learn more about linked opportunities on the Merkl blog.