Why is synchronous interaction between microservices used?

Synchronous interaction between microservices is used when it is necessary to get a result from another service immediately in order to continue processing. This ensures:

• Simplicity of implementation and understanding, as the call blocks execution until a response is received.
• Guarantee that the data is current at the time of the request.
• Convenience when implementing transactions or sequential operations, where the result of one step is needed for the next.

However, synchronous interaction can lead to delays and reduced fault tolerance, so it is used when timely response and data consistency are important.