Explainer: Why is Russia pushing so hard to take the Ukrainian city of Pokrovsk?

In a fierce display of military strategy, Russian forces are advancing on the critical city of Pokrovsk, nestled in the heart of the Donetsk region. This stronghold is essential for Russia's overarching plan to dominate the entire Donbas area. Despite the mounting pressure, Ukrainian troops are valiantly holding their ground against the ongoing assault.