What is Pub/Sub (Publish-Subscribe)?
A messaging pattern where senders publish messages to a topic and any number of subscribers receive them.
Why It Matters
Pub/sub decouples services so publishers do not need to know who receives their messages, making systems more flexible.
Real-World Example
A payment service publishes an 'order paid' event, and the shipping, email, and analytics services all receive it independently.
“Understanding terms like Pub/Sub (Publish-Subscribe) matters because it helps you have better conversations with developers and make smarter decisions about your software. You do not need to be technical. You just need to know enough to ask the right questions.”
Related Terms
Message Queue
A system that stores messages between services, ensuring they are processed even if the receiving service is busy.
Event-driven Architecture
A design pattern where components communicate by producing and reacting to events rather than direct calls.
Microservices
An architecture where an application is built as many small, independent services that work together
From definition to deployment
Knowing the term is step one. Using it in something real is the rest.