Entanglement Monogamy imposes restrictions on the distribution of entanglement. It's as if there is a limited amount of entanglement that two qubits can share, and sharing it with a third qubit isn't allowed without reducing the entanglement between the first two.
On the other hand, the Entanglement Polygamy allows for a more flexible distribution of entanglement, meaning that multiple qubits can share entanglement with a central qubit without being as constrained by the limitations of monogamy. It's as if there's more entanglement "to go around