Why It Matters
Microservices affect how quickly your application can evolve and how resilient it is to problems. Because each service is independent, your development team can update the payment system without touching the user account system, deploy changes faster, and isolate failures so a bug in one area does not bring down the entire application. The trade-off is complexity: microservices require more infrastructure, more coordination between teams, and stronger monitoring. They are the right choice for large, complex systems but overkill for most small-to-medium applications.
Example
An online marketplace starts as a single application. As it grows, the team splits it into microservices: one handles product listings, another manages the checkout process, a third runs seller payouts, and a fourth handles customer notifications. During a flash sale, the product listing service scales up to handle heavy traffic while the seller payout service continues running at normal capacity. No wasted resources, and no risk of the payout system being affected by the traffic spike.
The natural contrast here is the monolith, which explains when keeping everything in one codebase is the better call. Both sit in the glossary, and you can explore your options further on the custom software development page.
