On 6th July 2021, Amazon Pinpoint lowered the Transaction Per Second (TPS) sending limits to 1 TPS for campaigns and journeys. The new limit allows customer to execute slower sends through email, push and SMS channels. This will optimize delivery rates, and allow for easier testing and monitoring. A campaign is a messaging initiative that engages a specific audience segment with a single tailored message, while journeys are multi-step campaigns to guide a user through an experience with multiple messages. Campaigns and journeys are intended for customers with user engagement use cases, and who want to send targeted messages to their users and drive high value actions.
Source:: Amazon AWS