How long does sushi hold?

I'm curious to know, how long does sushi typically hold its freshness and quality? Is there a specific time frame that one should aim for in order to enjoy the best sushi experience? Additionally, are there any factors that can affect the shelf life of sushi, such as the type of fish used, the preparation method, or the storage conditions? As a consumer, it's important for me to understand these details to ensure that I'm consuming sushi at its optimal state.