I have a use case where an event triggered within an activity can initiate multiple workflows. These workflows may be executed within the same microservice or across different microservices.

I am considering using Signal in Temporal to achieve this.

Alternatively, the activity could broadcast a message to multiple microservices using RabbitMQ, which would then consume the message and start the respective workflows.

Which approach is better for my use case?

I am new to Temporal and using dotnet-sdk.