Benefits: higher availability and lower latency for global users. Pain points: data replication, consistency/conflict resolution, higher operational complexity, and cross-region latency/cost. Many teams start with active-passive (failover) before going active-active.
Expanding on the short answer — what usually matters in practice:
A tiny example (an explanation template):
// Example: discuss trade-offs for "multi-region-microservices:-what-are-the-main-be"
function explain() {
// Start from the core idea:
// Benefits: higher availability and lower latency for global users. Pain points: data replic
}