What are some cases for reverse proxies?

Can you provide some instances where reverse proxies might be used? For example, I've heard they can help with load balancing and security, but are there any other scenarios where they come in handy? Maybe in situations related to content caching, geo-targeting, or even protecting against DDoS attacks? I'm interested in learning more about the diverse use cases for reverse proxies and how they can benefit different types of web applications and servers.