Is it worth creating a consumer group if we only have one consumer?

If you have only one consumer, creating a consumer group is not necessary, but it can be useful in some cases:

• Without a consumer group, you simply read directly from the topic, which is simpler and slightly more efficient.
• With a consumer group, you gain advantages in managing offsets, automatic rebalancing, and the ability to easily scale in the future.

If scaling is planned or reliable processing with offset control is needed, it's better to use a consumer group even with a single consumer. This will simplify adding new consumers later and ensure a more robust architecture.

If the task is simple and does not require scaling, you can do without a consumer group.