In synchronous communication, the requesting service sends a request to the receiving service and waits for a response before continuing with its own processing.

 This is different from asynchronous communication, where the requesting service sends a message to a message queue and the receiving service processes the message at a later time. 

https://arpitbhayani.me/microservices/136#:~:text=Synchronous%20Communication,the%20response%20before%20proceeding%20further.