Load Balancer vs. API Gateway: When Should You Use Each One?

hey everyone, i'm trying to get a clearer picture on when to deploy a load balancer versus an API gateway. it seems like theres overlap, but also key differences. my understanding is that load balancers are primarily for distributing traffic across multiple instances of an application for availability and scalability. API gateways, on the other hand, handle things like authentication, rate limiting, request transformation, and routing to different backend services. but sometimes, a simple load balancer can do basic routing too. so, when do you specifically choose one over the other? are there scenarios where you'd use both? curious to hear your real-world experiences and decision-making processes.